Lie algebras

This file defines Lie rings and Lie algebras over a commutative ring together with their modules, morphisms and equivalences, as well as various lemmas to make these definitions usable.

Main definitions

• LieRing
• LieAlgebra
• LieRingModule
• LieModule
• LieHom
• LieEquiv
• LieModuleHom
• LieModuleEquiv

Notation

Working over a fixed commutative ring R, we introduce the notations:

• L →ₗ⁅R⁆ L' for a morphism of Lie algebras,
• L ≃ₗ⁅R⁆ L' for an equivalence of Lie algebras,
• M →ₗ⁅R,L⁆ N for a morphism of Lie algebra modules M, N over a Lie algebra L,
• M ≃ₗ⁅R,L⁆ N for an equivalence of Lie algebra modules M, N over a Lie algebra L.

Implementation notes

Lie algebras are defined as modules with a compatible Lie ring structure and thus, like modules, are partially unbundled.

References

• N. Bourbaki, Lie Groups and Lie Algebras, Chapters 1--3

Tagsc

lie bracket, jacobi identity, lie ring, lie algebra, lie module

class LieRing (L : Type v) extends AddCommGroup , Bracket : Type v

A Lie ring is an additive group with compatible product, known as the bracket, satisfying the Jacobi identity.

• add : L → L → L
• add_assoc : ∀ (a b c : L), a + b + c = a + (b + c)
• zero : L
• zero_add : ∀ (a : L), 0 + a = a
• add_zero : ∀ (a : L), a + 0 = a
• nsmul : ℕ → L → L
• nsmul_zero : ∀ (x : L), AddMonoid.nsmul 0 x = 0
• nsmul_succ : ∀ (n : ℕ) (x : L), AddMonoid.nsmul (n + 1) x = x + AddMonoid.nsmul n x
• neg : L → L
• sub : L → L → L
• sub_eq_add_neg : ∀ (a b : L), a - b = a + -b
• zsmul : ℤ → L → L
• zsmul_zero' : ∀ (a : L), SubNegMonoid.zsmul 0 a = 0
• zsmul_succ' : ∀ (n : ℕ) (a : L), SubNegMonoid.zsmul (Int.ofNat (Nat.succ n)) a = a + SubNegMonoid.zsmul (Int.ofNat n) a
• zsmul_neg' : ∀ (n : ℕ) (a : L), SubNegMonoid.zsmul (Int.negSucc n) a = -SubNegMonoid.zsmul (↑(Nat.succ n)) a
• add_left_neg : ∀ (a : L), -a + a = 0
• add_comm : ∀ (a b : L), a + b = b + a
• bracket : L → L → L
• add_lie : ∀ (x y z : L), ⁅x + y, z⁆ = ⁅x, z⁆ + ⁅y, z⁆

  A Lie ring bracket is additive in its first component.

• lie_add : ∀ (x y z : L), ⁅x, y + z⁆ = ⁅x, y⁆ + ⁅x, z⁆

  A Lie ring bracket is additive in its second component.

• lie_self : ∀ (x : L), ⁅x, x⁆ = 0

  A Lie ring bracket vanishes on the diagonal in L × L.

• leibniz_lie : ∀ (x y z : L), ⁅x, ⁅y, z⁆⁆ = ⁅⁅x, y⁆, z⁆ + ⁅y, ⁅x, z⁆⁆

  A Lie ring bracket satisfies a Leibniz / Jacobi identity.

class LieAlgebra (R : Type u) (L : Type v) [CommRing R] [LieRing L] extends Module : Type (max u v)

A Lie algebra is a module with compatible product, known as the bracket, satisfying the Jacobi identity. Forgetting the scalar multiplication, every Lie algebra is a Lie ring.

• smul : R → L → L
• one_smul : ∀ (b : L), 1 • b = b
• mul_smul : ∀ (x y : R) (b : L), (x * y) • b = x • y • b
• smul_zero : ∀ (a : R), a • 0 = 0
• smul_add : ∀ (a : R) (x y : L), a • (x + y) = a • x + a • y
• add_smul : ∀ (r s : R) (x : L), (r + s) • x = r • x + s • x
• zero_smul : ∀ (x : L), 0 • x = 0
• lie_smul : ∀ (t : R) (x y : L), ⁅x, t • y⁆ = t • ⁅x, y⁆

  A Lie algebra bracket is compatible with scalar multiplication in its second argument.

  The compatibility in the first argument is not a class property, but follows since every Lie algebra has a natural Lie module action on itself, see LieModule.

class LieRingModule (L : Type v) (M : Type w) [LieRing L] [AddCommGroup M] extends Bracket : Type (max v w)

A Lie ring module is an additive group, together with an additive action of a Lie ring on this group, such that the Lie bracket acts as the commutator of endomorphisms. (For representations of Lie algebras see LieModule.)

• bracket : L → M → M
• add_lie : ∀ (x y : L) (m : M), ⁅x + y, m⁆ = ⁅x, m⁆ + ⁅y, m⁆

  A Lie ring module bracket is additive in its first component.

• lie_add : ∀ (x : L) (m n : M), ⁅x, m + n⁆ = ⁅x, m⁆ + ⁅x, n⁆

  A Lie ring module bracket is additive in its second component.

• leibniz_lie : ∀ (x y : L) (m : M), ⁅x, ⁅y, m⁆⁆ = ⁅⁅x, y⁆, m⁆ + ⁅y, ⁅x, m⁆⁆

  A Lie ring module bracket satisfies a Leibniz / Jacobi identity.

class LieModule (R : Type u) (L : Type v) (M : Type w) [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [Module R M] [LieRingModule L M] : Prop

A Lie module is a module over a commutative ring, together with a linear action of a Lie algebra on this module, such that the Lie bracket acts as the commutator of endomorphisms.

• smul_lie : ∀ (t : R) (x : L) (m : M), ⁅t • x, m⁆ = t • ⁅x, m⁆

  A Lie module bracket is compatible with scalar multiplication in its first argument.

• lie_smul : ∀ (t : R) (x : L) (m : M), ⁅x, t • m⁆ = t • ⁅x, m⁆

  A Lie module bracket is compatible with scalar multiplication in its second argument.

@[simp]

theorem add_lie {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (y : L) (m : M) : ⁅x + y, m⁆ = ⁅x, m⁆ + ⁅y, m⁆

@[simp]

theorem lie_add {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (m : M) (n : M) : ⁅x, m + n⁆ = ⁅x, m⁆ + ⁅x, n⁆

@[simp]

theorem smul_lie {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [Module R M] [LieRingModule L M] [LieModule R L M] (t : R) (x : L) (m : M) : ⁅t • x, m⁆ = t • ⁅x, m⁆

@[simp]

theorem lie_smul {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [Module R M] [LieRingModule L M] [LieModule R L M] (t : R) (x : L) (m : M) : ⁅x, t • m⁆ = t • ⁅x, m⁆

theorem leibniz_lie {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (y : L) (m : M) : ⁅x, ⁅y, m⁆⁆ = ⁅⁅x, y⁆, m⁆ + ⁅y, ⁅x, m⁆⁆

@[simp]

theorem lie_zero {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) : ⁅x, 0⁆ = 0

@[simp]

theorem zero_lie {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (m : M) : ⁅0, m⁆ = 0

@[simp]

theorem lie_self {L : Type v} [LieRing L] (x : L) : ⁅x, x⁆ = 0

instance lieRingSelfModule {L : Type v} [LieRing L] : LieRingModule L L

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem lie_skew {L : Type v} [LieRing L] (x : L) (y : L) : -⁅y, x⁆ = ⁅x, y⁆

instance lieAlgebraSelfModule {R : Type u} {L : Type v} [CommRing R] [LieRing L] [LieAlgebra R L] : LieModule R L L

Every Lie algebra is a module over itself.

Equations

• (_ : LieModule R L L) = (_ : LieModule R L L)

@[simp]

theorem neg_lie {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (m : M) : ⁅-x, m⁆ = -⁅x, m⁆

@[simp]

theorem lie_neg {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (m : M) : ⁅x, -m⁆ = -⁅x, m⁆

@[simp]

theorem sub_lie {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (y : L) (m : M) : ⁅x - y, m⁆ = ⁅x, m⁆ - ⁅y, m⁆

@[simp]

theorem lie_sub {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (m : M) (n : M) : ⁅x, m - n⁆ = ⁅x, m⁆ - ⁅x, n⁆

@[simp]

theorem nsmul_lie {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (m : M) (n : ℕ) : ⁅n • x, m⁆ = n • ⁅x, m⁆

@[simp]

theorem lie_nsmul {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (m : M) (n : ℕ) : ⁅x, n • m⁆ = n • ⁅x, m⁆

@[simp]

theorem zsmul_lie {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (m : M) (a : ℤ) : ⁅a • x, m⁆ = a • ⁅x, m⁆

@[simp]

theorem lie_zsmul {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (m : M) (a : ℤ) : ⁅x, a • m⁆ = a • ⁅x, m⁆

@[simp]

theorem lie_lie {L : Type v} {M : Type w} [LieRing L] [AddCommGroup M] [LieRingModule L M] (x : L) (y : L) (m : M) : ⁅⁅x, y⁆, m⁆ = ⁅x, ⁅y, m⁆⁆ - ⁅y, ⁅x, m⁆⁆

theorem lie_jacobi {L : Type v} [LieRing L] (x : L) (y : L) (z : L) : ⁅x, ⁅y, z⁆⁆ + ⁅y, ⁅z, x⁆⁆ + ⁅z, ⁅x, y⁆⁆ = 0

instance LieRing.instLieAlgebra {L : Type v} [LieRing L] : LieAlgebra ℤ L

Equations

• LieRing.instLieAlgebra = LieAlgebra.mk (_ : ∀ (n : ℤ) (x y : L), ⁅x, n • y⁆ = n • ⁅x, y⁆)

instance LinearMap.instLieRingModule {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [Module R M] [LieRingModule L M] [LieModule R L M] [AddCommGroup N] [Module R N] [LieRingModule L N] [LieModule R L N] : LieRingModule L (M →ₗ[R] N)

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieHom.lie_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [Module R M] [LieRingModule L M] [LieModule R L M] [AddCommGroup N] [Module R N] [LieRingModule L N] [LieModule R L N] (f : M →ₗ[R] N) (x : L) (m : M) : ⁅x, f⁆ m = ⁅x, f m⁆ - f ⁅x, m⁆

instance LinearMap.instLieModule {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [Module R M] [LieRingModule L M] [LieModule R L M] [AddCommGroup N] [Module R N] [LieRingModule L N] [LieModule R L N] : LieModule R L (M →ₗ[R] N)

Equations

• (_ : LieModule R L (M →ₗ[R] N)) = (_ : LieModule R L (M →ₗ[R] N))

instance Module.Dual.instLieRingModule {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [Module R M] [LieRingModule L M] [LieModule R L M] : LieRingModule L (M →ₗ[R] R)

We could avoid defining this by instead defining a LieRingModule L R instance with a zero bracket and relying on LinearMap.instLieRingModule. We do not do this because in the case that L = R we would have a non-defeq diamond via Ring.instBracket.

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem Module.Dual.lie_apply {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [Module R M] [LieRingModule L M] [LieModule R L M] (x : L) (m : M) (f : M →ₗ[R] R) : ⁅x, f⁆ m = -f ⁅x, m⁆

instance Module.Dual.instLieModule {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [Module R M] [LieRingModule L M] [LieModule R L M] : LieModule R L (M →ₗ[R] R)

Equations

• (_ : LieModule R L (M →ₗ[R] R)) = (_ : LieModule R L (M →ₗ[R] R))

structure LieHom (R : Type u_1) (L : Type u_2) (L' : Type u_3) [CommRing R] [LieRing L] [LieAlgebra R L] [LieRing L'] [LieAlgebra R L'] extends LinearMap : Type (max u_2 u_3)

A morphism of Lie algebras is a linear map respecting the bracket operations.

• toFun : L → L'
• map_add' : ∀ (x y : L), self.toAddHom.toFun (x + y) = self.toAddHom.toFun x + self.toAddHom.toFun y
• map_smul' : ∀ (r : R) (x : L), self.toAddHom.toFun (r • x) = (RingHom.id R) r • self.toAddHom.toFun x
• map_lie' : ∀ {x y : L}, self.toAddHom.toFun ⁅x, y⁆ = ⁅self.toAddHom.toFun x, self.toAddHom.toFun y⁆

  A morphism of Lie algebras is compatible with brackets.

def «term_→ₗ⁅_⁆_» : Lean.TrailingParserDescr

A morphism of Lie algebras is a linear map respecting the bracket operations.

Equations

• One or more equations did not get rendered due to their size.

instance LieHom.instCoeLieHomLinearMapToSemiringToCommSemiringIdToNonAssocSemiringToAddCommMonoidToAddCommGroupToAddCommMonoidToAddCommGroupToModuleToModule {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] : Coe (L₁ →ₗ⁅R⁆ L₂) (L₁ →ₗ[R] L₂)

Equations

• LieHom.instCoeLieHomLinearMapToSemiringToCommSemiringIdToNonAssocSemiringToAddCommMonoidToAddCommGroupToAddCommMonoidToAddCommGroupToModuleToModule = { coe := LieHom.toLinearMap }

instance LieHom.instFunLikeLieHom {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] : FunLike (L₁ →ₗ⁅R⁆ L₂) L₁ L₂

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieHom.coe_toLinearMap {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) : ⇑↑f = ⇑f

@[simp]

theorem LieHom.toFun_eq_coe {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) : f.toFun = ⇑f

@[simp]

theorem LieHom.map_smul {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (c : R) (x : L₁) : f (c • x) = c • f x

@[simp]

theorem LieHom.map_add {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (x : L₁) (y : L₁) : f (x + y) = f x + f y

@[simp]

theorem LieHom.map_sub {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (x : L₁) (y : L₁) : f (x - y) = f x - f y

@[simp]

theorem LieHom.map_neg {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (x : L₁) : f (-x) = -f x

@[simp]

theorem LieHom.map_lie {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (x : L₁) (y : L₁) : f ⁅x, y⁆ = ⁅f x, f y⁆

@[simp]

theorem LieHom.map_zero {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) : f 0 = 0

def LieHom.id {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] : L₁ →ₗ⁅R⁆ L₁

The identity map is a morphism of Lie algebras.

Equations

• LieHom.id = let src := LinearMap.id; { toLinearMap := src, map_lie' := (_ : ∀ {x y : L₁}, LinearMap.id.toAddHom.toFun ⁅x, y⁆ = LinearMap.id.toAddHom.toFun ⁅x, y⁆) }

@[simp]

theorem LieHom.coe_id {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] : ⇑LieHom.id = id

theorem LieHom.id_apply {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] (x : L₁) : LieHom.id x = x

instance LieHom.instZeroLieHom {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] : Zero (L₁ →ₗ⁅R⁆ L₂)

The constant 0 map is a Lie algebra morphism.

Equations

• LieHom.instZeroLieHom = { zero := let src := 0; { toLinearMap := src, map_lie' := (_ : L₁ → L₁ → 0 = ⁅0, 0⁆) } }

@[simp]

theorem LieHom.coe_zero {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] : ⇑0 = 0

theorem LieHom.zero_apply {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (x : L₁) : 0 x = 0

instance LieHom.instOneLieHom {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] : One (L₁ →ₗ⁅R⁆ L₁)

The identity map is a Lie algebra morphism.

Equations

• LieHom.instOneLieHom = { one := LieHom.id }

@[simp]

theorem LieHom.coe_one {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] : ⇑1 = id

theorem LieHom.one_apply {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] (x : L₁) : 1 x = x

instance LieHom.instInhabitedLieHom {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] : Inhabited (L₁ →ₗ⁅R⁆ L₂)

Equations

• LieHom.instInhabitedLieHom = { default := 0 }

theorem LieHom.coe_injective {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] : Function.Injective DFunLike.coe

theorem LieHom.ext {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] {f : L₁ →ₗ⁅R⁆ L₂} {g : L₁ →ₗ⁅R⁆ L₂} (h : ∀ (x : L₁), f x = g x) : f = g

theorem LieHom.ext_iff {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] {f : L₁ →ₗ⁅R⁆ L₂} {g : L₁ →ₗ⁅R⁆ L₂} : f = g ↔ ∀ (x : L₁), f x = g x

theorem LieHom.congr_fun {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] {f : L₁ →ₗ⁅R⁆ L₂} {g : L₁ →ₗ⁅R⁆ L₂} (h : f = g) (x : L₁) : f x = g x

@[simp]

theorem LieHom.mk_coe {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (h₁ : ∀ (x y : L₁), f (x + y) = f x + f y) (h₂ : ∀ (r : R) (x : L₁), { toFun := ⇑f, map_add' := h₁ }.toFun (r • x) = (RingHom.id R) r • { toFun := ⇑f, map_add' := h₁ }.toFun x) (h₃ : ∀ {x y : L₁}, { toAddHom := { toFun := ⇑f, map_add' := h₁ }, map_smul' := h₂ }.toAddHom.toFun ⁅x, y⁆ = ⁅{ toAddHom := { toFun := ⇑f, map_add' := h₁ }, map_smul' := h₂ }.toAddHom.toFun x, { toAddHom := { toFun := ⇑f, map_add' := h₁ }, map_smul' := h₂ }.toAddHom.toFun y⁆) : { toLinearMap := { toAddHom := { toFun := ⇑f, map_add' := h₁ }, map_smul' := h₂ }, map_lie' := h₃ } = f

@[simp]

theorem LieHom.coe_mk {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ → L₂) (h₁ : ∀ (x y : L₁), f (x + y) = f x + f y) (h₂ : ∀ (r : R) (x : L₁), { toFun := f, map_add' := h₁ }.toFun (r • x) = (RingHom.id R) r • { toFun := f, map_add' := h₁ }.toFun x) (h₃ : ∀ {x y : L₁}, { toAddHom := { toFun := f, map_add' := h₁ }, map_smul' := h₂ }.toAddHom.toFun ⁅x, y⁆ = ⁅{ toAddHom := { toFun := f, map_add' := h₁ }, map_smul' := h₂ }.toAddHom.toFun x, { toAddHom := { toFun := f, map_add' := h₁ }, map_smul' := h₂ }.toAddHom.toFun y⁆) : ⇑{ toLinearMap := { toAddHom := { toFun := f, map_add' := h₁ }, map_smul' := h₂ }, map_lie' := h₃ } = f

def LieHom.comp {R : Type u} {L₁ : Type v} {L₂ : Type w} {L₃ : Type w₁} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] [LieRing L₃] [LieAlgebra R L₃] (f : L₂ →ₗ⁅R⁆ L₃) (g : L₁ →ₗ⁅R⁆ L₂) : L₁ →ₗ⁅R⁆ L₃

The composition of morphisms is a morphism.

Equations

• LieHom.comp f g = let src := LinearMap.comp ↑f ↑g; { toLinearMap := src, map_lie' := (_ : ∀ {x y : L₁}, f (g ⁅x, y⁆) = ⁅f (g x), f (g y)⁆) }

theorem LieHom.comp_apply {R : Type u} {L₁ : Type v} {L₂ : Type w} {L₃ : Type w₁} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] [LieRing L₃] [LieAlgebra R L₃] (f : L₂ →ₗ⁅R⁆ L₃) (g : L₁ →ₗ⁅R⁆ L₂) (x : L₁) : (LieHom.comp f g) x = f (g x)

@[simp]

theorem LieHom.coe_comp {R : Type u} {L₁ : Type v} {L₂ : Type w} {L₃ : Type w₁} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] [LieRing L₃] [LieAlgebra R L₃] (f : L₂ →ₗ⁅R⁆ L₃) (g : L₁ →ₗ⁅R⁆ L₂) : ⇑(LieHom.comp f g) = ⇑f ∘ ⇑g

@[simp]

theorem LieHom.coe_linearMap_comp {R : Type u} {L₁ : Type v} {L₂ : Type w} {L₃ : Type w₁} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] [LieRing L₃] [LieAlgebra R L₃] (f : L₂ →ₗ⁅R⁆ L₃) (g : L₁ →ₗ⁅R⁆ L₂) : ↑(LieHom.comp f g) = ↑f ∘ₗ ↑g

@[simp]

theorem LieHom.comp_id {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) : LieHom.comp f LieHom.id = f

@[simp]

theorem LieHom.id_comp {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) : LieHom.comp LieHom.id f = f

def LieHom.inverse {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (g : L₂ → L₁) (h₁ : Function.LeftInverse g ⇑f) (h₂ : Function.RightInverse g ⇑f) : L₂ →ₗ⁅R⁆ L₁

The inverse of a bijective morphism is a morphism.

Equations

• LieHom.inverse f g h₁ h₂ = let src := LinearMap.inverse (↑f) g h₁ h₂; { toLinearMap := src, map_lie' := (_ : ∀ {x y : L₂}, g ⁅x, y⁆ = ⁅g x, g y⁆) }

def LieRingModule.compLieHom {R : Type u} {L₁ : Type v} {L₂ : Type w} (M : Type w₁) [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] [AddCommGroup M] [LieRingModule L₂ M] (f : L₁ →ₗ⁅R⁆ L₂) : LieRingModule L₁ M

A Lie ring module may be pulled back along a morphism of Lie algebras.

See note [reducible non-instances].

Equations

• One or more equations did not get rendered due to their size.

theorem LieRingModule.compLieHom_apply {R : Type u} {L₁ : Type v} {L₂ : Type w} (M : Type w₁) [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] [AddCommGroup M] [LieRingModule L₂ M] (f : L₁ →ₗ⁅R⁆ L₂) (x : L₁) (m : M) : ⁅x, m⁆ = ⁅f x, m⁆

theorem LieModule.compLieHom {R : Type u} {L₁ : Type v} {L₂ : Type w} (M : Type w₁) [CommRing R] [LieRing L₁] [LieAlgebra R L₁] [LieRing L₂] [LieAlgebra R L₂] [AddCommGroup M] [LieRingModule L₂ M] (f : L₁ →ₗ⁅R⁆ L₂) [Module R M] [LieModule R L₂ M] : LieModule R L₁ M

A Lie module may be pulled back along a morphism of Lie algebras.

structure LieEquiv (R : Type u) (L : Type v) (L' : Type w) [CommRing R] [LieRing L] [LieAlgebra R L] [LieRing L'] [LieAlgebra R L'] extends LieHom : Type (max v w)

An equivalence of Lie algebras is a morphism which is also a linear equivalence. We could instead define an equivalence to be a morphism which is also a (plain) equivalence. However it is more convenient to define via linear equivalence to get .toLinearEquiv for free.

• toFun : L → L'
• map_add' : ∀ (x y : L), self.toAddHom.toFun (x + y) = self.toAddHom.toFun x + self.toAddHom.toFun y
• map_smul' : ∀ (r : R) (x : L), self.toAddHom.toFun (r • x) = (RingHom.id R) r • self.toAddHom.toFun x
• map_lie' : ∀ {x y : L}, self.toAddHom.toFun ⁅x, y⁆ = ⁅self.toAddHom.toFun x, self.toAddHom.toFun y⁆
• invFun : L' → L

  The inverse function of an equivalence of Lie algebras

• left_inv : Function.LeftInverse self.invFun self.toFun

  The inverse function of an equivalence of Lie algebras is a left inverse of the underlying function.

• right_inv : Function.RightInverse self.invFun self.toFun

  The inverse function of an equivalence of Lie algebras is a right inverse of the underlying function.

def «term_≃ₗ⁅_⁆_» : Lean.TrailingParserDescr

An equivalence of Lie algebras is a morphism which is also a linear equivalence. We could instead define an equivalence to be a morphism which is also a (plain) equivalence. However it is more convenient to define via linear equivalence to get .toLinearEquiv for free.

Equations

• One or more equations did not get rendered due to their size.

def LieEquiv.toLinearEquiv {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (f : L₁ ≃ₗ⁅R⁆ L₂) : L₁ ≃ₗ[R] L₂

Consider an equivalence of Lie algebras as a linear equivalence.

Equations

• One or more equations did not get rendered due to their size.

instance LieEquiv.hasCoeToLieHom {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] : Coe (L₁ ≃ₗ⁅R⁆ L₂) (L₁ →ₗ⁅R⁆ L₂)

Equations

• LieEquiv.hasCoeToLieHom = { coe := LieEquiv.toLieHom }

instance LieEquiv.hasCoeToLinearEquiv {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] : Coe (L₁ ≃ₗ⁅R⁆ L₂) (L₁ ≃ₗ[R] L₂)

Equations

• LieEquiv.hasCoeToLinearEquiv = { coe := LieEquiv.toLinearEquiv }

instance LieEquiv.instEquivLikeLieEquiv {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] : EquivLike (L₁ ≃ₗ⁅R⁆ L₂) L₁ L₂

Equations

• One or more equations did not get rendered due to their size.

theorem LieEquiv.coe_to_lieHom {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) : ⇑e.toLieHom = ⇑e

@[simp]

theorem LieEquiv.coe_to_linearEquiv {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) : ⇑(LieEquiv.toLinearEquiv e) = ⇑e

@[simp]

theorem LieEquiv.to_linearEquiv_mk {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (g : L₂ → L₁) (h₁ : Function.LeftInverse g f.toFun) (h₂ : Function.RightInverse g f.toFun) : LieEquiv.toLinearEquiv { toLieHom := f, invFun := g, left_inv := h₁, right_inv := h₂ } = { toLinearMap := ↑f, invFun := g, left_inv := h₁, right_inv := h₂ }

theorem LieEquiv.coe_linearEquiv_injective {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] : Function.Injective LieEquiv.toLinearEquiv

theorem LieEquiv.coe_injective {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] : Function.Injective DFunLike.coe

theorem LieEquiv.ext {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] {f : L₁ ≃ₗ⁅R⁆ L₂} {g : L₁ ≃ₗ⁅R⁆ L₂} (h : ∀ (x : L₁), f x = g x) : f = g

instance LieEquiv.instOneLieEquiv {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] : One (L₁ ≃ₗ⁅R⁆ L₁)

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieEquiv.one_apply {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] (x : L₁) : 1 x = x

instance LieEquiv.instInhabitedLieEquiv {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] : Inhabited (L₁ ≃ₗ⁅R⁆ L₁)

Equations

• LieEquiv.instInhabitedLieEquiv = { default := 1 }

def LieEquiv.refl {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] : L₁ ≃ₗ⁅R⁆ L₁

Lie algebra equivalences are reflexive.

Equations

• LieEquiv.refl = 1

@[simp]

theorem LieEquiv.refl_apply {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] (x : L₁) : LieEquiv.refl x = x

def LieEquiv.symm {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) : L₂ ≃ₗ⁅R⁆ L₁

Lie algebra equivalences are symmetric.

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieEquiv.symm_symm {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) : LieEquiv.symm (LieEquiv.symm e) = e

theorem LieEquiv.symm_bijective {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] : Function.Bijective LieEquiv.symm

@[simp]

theorem LieEquiv.apply_symm_apply {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) (x : L₂) : e ((LieEquiv.symm e) x) = x

@[simp]

theorem LieEquiv.symm_apply_apply {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) (x : L₁) : (LieEquiv.symm e) (e x) = x

@[simp]

theorem LieEquiv.refl_symm {R : Type u} {L₁ : Type v} [CommRing R] [LieRing L₁] [LieAlgebra R L₁] : LieEquiv.symm LieEquiv.refl = LieEquiv.refl

def LieEquiv.trans {R : Type u} {L₁ : Type v} {L₂ : Type w} {L₃ : Type w₁} [CommRing R] [LieRing L₁] [LieRing L₂] [LieRing L₃] [LieAlgebra R L₁] [LieAlgebra R L₂] [LieAlgebra R L₃] (e₁ : L₁ ≃ₗ⁅R⁆ L₂) (e₂ : L₂ ≃ₗ⁅R⁆ L₃) : L₁ ≃ₗ⁅R⁆ L₃

Lie algebra equivalences are transitive.

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieEquiv.self_trans_symm {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) : LieEquiv.trans e (LieEquiv.symm e) = LieEquiv.refl

@[simp]

theorem LieEquiv.symm_trans_self {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) : LieEquiv.trans (LieEquiv.symm e) e = LieEquiv.refl

@[simp]

theorem LieEquiv.trans_apply {R : Type u} {L₁ : Type v} {L₂ : Type w} {L₃ : Type w₁} [CommRing R] [LieRing L₁] [LieRing L₂] [LieRing L₃] [LieAlgebra R L₁] [LieAlgebra R L₂] [LieAlgebra R L₃] (e₁ : L₁ ≃ₗ⁅R⁆ L₂) (e₂ : L₂ ≃ₗ⁅R⁆ L₃) (x : L₁) : (LieEquiv.trans e₁ e₂) x = e₂ (e₁ x)

@[simp]

theorem LieEquiv.symm_trans {R : Type u} {L₁ : Type v} {L₂ : Type w} {L₃ : Type w₁} [CommRing R] [LieRing L₁] [LieRing L₂] [LieRing L₃] [LieAlgebra R L₁] [LieAlgebra R L₂] [LieAlgebra R L₃] (e₁ : L₁ ≃ₗ⁅R⁆ L₂) (e₂ : L₂ ≃ₗ⁅R⁆ L₃) : LieEquiv.symm (LieEquiv.trans e₁ e₂) = LieEquiv.trans (LieEquiv.symm e₂) (LieEquiv.symm e₁)

theorem LieEquiv.bijective {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) : Function.Bijective ⇑e.toLieHom

theorem LieEquiv.injective {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) : Function.Injective ⇑e.toLieHom

theorem LieEquiv.surjective {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (e : L₁ ≃ₗ⁅R⁆ L₂) : Function.Surjective ⇑e.toLieHom

@[simp]

theorem LieEquiv.ofBijective_invFun {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (h : Function.Bijective ⇑f) : ∀ (a : L₂), (LieEquiv.ofBijective f h).invFun a = (LinearEquiv.symm (LinearEquiv.ofBijective (↑f) h)) a

@[simp]

theorem LieEquiv.ofBijective_toFun {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (h : Function.Bijective ⇑f) (a : L₁) : (LieEquiv.ofBijective f h) a = f a

noncomputable def LieEquiv.ofBijective {R : Type u} {L₁ : Type v} {L₂ : Type w} [CommRing R] [LieRing L₁] [LieRing L₂] [LieAlgebra R L₁] [LieAlgebra R L₂] (f : L₁ →ₗ⁅R⁆ L₂) (h : Function.Bijective ⇑f) : L₁ ≃ₗ⁅R⁆ L₂

A bijective morphism of Lie algebras yields an equivalence of Lie algebras.

Equations

• One or more equations did not get rendered due to their size.

structure LieModuleHom (R : Type u) (L : Type v) (M : Type w) (N : Type w₁) [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] extends LinearMap : Type (max w w₁)

A morphism of Lie algebra modules is a linear map which commutes with the action of the Lie algebra.

• toFun : M → N
• map_add' : ∀ (x y : M), self.toAddHom.toFun (x + y) = self.toAddHom.toFun x + self.toAddHom.toFun y
• map_smul' : ∀ (r : R) (x : M), self.toAddHom.toFun (r • x) = (RingHom.id R) r • self.toAddHom.toFun x
• map_lie' : ∀ {x : L} {m : M}, self.toAddHom.toFun ⁅x, m⁆ = ⁅x, self.toAddHom.toFun m⁆

  A module of Lie algebra modules is compatible with the action of the Lie algebra on the modules.

def «term_→ₗ⁅_,_⁆_» : Lean.TrailingParserDescr

A morphism of Lie algebra modules is a linear map which commutes with the action of the Lie algebra.

Equations

• One or more equations did not get rendered due to their size.

instance LieModuleHom.instCoeOutLieModuleHomLinearMapToSemiringToCommSemiringIdToNonAssocSemiringToAddCommMonoidToAddCommMonoid {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : CoeOut (M →ₗ⁅R,L⁆ N) (M →ₗ[R] N)

Equations

• LieModuleHom.instCoeOutLieModuleHomLinearMapToSemiringToCommSemiringIdToNonAssocSemiringToAddCommMonoidToAddCommMonoid = { coe := LieModuleHom.toLinearMap }

instance LieModuleHom.instFunLikeLieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : FunLike (M →ₗ⁅R,L⁆ N) M N

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieModuleHom.coe_toLinearMap {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) : ⇑↑f = ⇑f

@[simp]

theorem LieModuleHom.map_smul {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (c : R) (x : M) : f (c • x) = c • f x

@[simp]

theorem LieModuleHom.map_add {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (x : M) (y : M) : f (x + y) = f x + f y

@[simp]

theorem LieModuleHom.map_sub {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (x : M) (y : M) : f (x - y) = f x - f y

@[simp]

theorem LieModuleHom.map_neg {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (x : M) : f (-x) = -f x

@[simp]

theorem LieModuleHom.map_lie {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (x : L) (m : M) : f ⁅x, m⁆ = ⁅x, f m⁆

theorem LieModuleHom.map_lie₂ {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} {P : Type w₂} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [AddCommGroup N] [AddCommGroup P] [Module R M] [Module R N] [Module R P] [LieRingModule L M] [LieRingModule L N] [LieRingModule L P] [LieModule R L N] [LieModule R L P] (f : M →ₗ⁅R,L⁆ N →ₗ[R] P) (x : L) (m : M) (n : N) : ⁅x, (f m) n⁆ = (f ⁅x, m⁆) n + (f m) ⁅x, n⁆

@[simp]

theorem LieModuleHom.map_zero {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) : f 0 = 0

def LieModuleHom.id {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [AddCommGroup M] [Module R M] [LieRingModule L M] : M →ₗ⁅R,L⁆ M

The identity map is a morphism of Lie modules.

Equations

• LieModuleHom.id = let src := LinearMap.id; { toLinearMap := src, map_lie' := (_ : ∀ {x : L} {m : M}, LinearMap.id.toAddHom.toFun ⁅x, m⁆ = LinearMap.id.toAddHom.toFun ⁅x, m⁆) }

@[simp]

theorem LieModuleHom.coe_id {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [AddCommGroup M] [Module R M] [LieRingModule L M] : ⇑LieModuleHom.id = id

theorem LieModuleHom.id_apply {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [AddCommGroup M] [Module R M] [LieRingModule L M] (x : M) : LieModuleHom.id x = x

instance LieModuleHom.instZeroLieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : Zero (M →ₗ⁅R,L⁆ N)

The constant 0 map is a Lie module morphism.

Equations

• LieModuleHom.instZeroLieModuleHom = { zero := let src := 0; { toLinearMap := src, map_lie' := (_ : ∀ (a : L), M → 0 = ⁅a, 0⁆) } }

@[simp]

theorem LieModuleHom.coe_zero {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : ⇑0 = 0

theorem LieModuleHom.zero_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (m : M) : 0 m = 0

instance LieModuleHom.instOneLieModuleHom {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [AddCommGroup M] [Module R M] [LieRingModule L M] : One (M →ₗ⁅R,L⁆ M)

The identity map is a Lie module morphism.

Equations

• LieModuleHom.instOneLieModuleHom = { one := LieModuleHom.id }

instance LieModuleHom.instInhabitedLieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : Inhabited (M →ₗ⁅R,L⁆ N)

Equations

• LieModuleHom.instInhabitedLieModuleHom = { default := 0 }

theorem LieModuleHom.coe_injective {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : Function.Injective DFunLike.coe

theorem LieModuleHom.ext {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] {f : M →ₗ⁅R,L⁆ N} {g : M →ₗ⁅R,L⁆ N} (h : ∀ (m : M), f m = g m) : f = g

theorem LieModuleHom.ext_iff {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] {f : M →ₗ⁅R,L⁆ N} {g : M →ₗ⁅R,L⁆ N} : f = g ↔ ∀ (m : M), f m = g m

theorem LieModuleHom.congr_fun {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] {f : M →ₗ⁅R,L⁆ N} {g : M →ₗ⁅R,L⁆ N} (h : f = g) (x : M) : f x = g x

@[simp]

theorem LieModuleHom.mk_coe {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (h : ∀ {x : L} {m : M}, f.toAddHom.toFun ⁅x, m⁆ = ⁅x, f.toAddHom.toFun m⁆) : { toLinearMap := ↑f, map_lie' := h } = f

@[simp]

theorem LieModuleHom.coe_mk {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ[R] N) (h : ∀ {x : L} {m : M}, f.toAddHom.toFun ⁅x, m⁆ = ⁅x, f.toAddHom.toFun m⁆) : ⇑{ toLinearMap := f, map_lie' := h } = ⇑f

theorem LieModuleHom.coe_linear_mk {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ[R] N) (h : ∀ {x : L} {m : M}, f.toAddHom.toFun ⁅x, m⁆ = ⁅x, f.toAddHom.toFun m⁆) : ↑{ toLinearMap := f, map_lie' := h } = f

def LieModuleHom.comp {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} {P : Type w₂} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [AddCommGroup P] [Module R M] [Module R N] [Module R P] [LieRingModule L M] [LieRingModule L N] [LieRingModule L P] (f : N →ₗ⁅R,L⁆ P) (g : M →ₗ⁅R,L⁆ N) : M →ₗ⁅R,L⁆ P

The composition of Lie module morphisms is a morphism.

Equations

• LieModuleHom.comp f g = let src := LinearMap.comp ↑f ↑g; { toLinearMap := src, map_lie' := (_ : ∀ {x : L} {m : M}, f (g ⁅x, m⁆) = ⁅x, f (g m)⁆) }

theorem LieModuleHom.comp_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} {P : Type w₂} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [AddCommGroup P] [Module R M] [Module R N] [Module R P] [LieRingModule L M] [LieRingModule L N] [LieRingModule L P] (f : N →ₗ⁅R,L⁆ P) (g : M →ₗ⁅R,L⁆ N) (m : M) : (LieModuleHom.comp f g) m = f (g m)

@[simp]

theorem LieModuleHom.coe_comp {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} {P : Type w₂} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [AddCommGroup P] [Module R M] [Module R N] [Module R P] [LieRingModule L M] [LieRingModule L N] [LieRingModule L P] (f : N →ₗ⁅R,L⁆ P) (g : M →ₗ⁅R,L⁆ N) : ⇑(LieModuleHom.comp f g) = ⇑f ∘ ⇑g

@[simp]

theorem LieModuleHom.coe_linearMap_comp {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} {P : Type w₂} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [AddCommGroup P] [Module R M] [Module R N] [Module R P] [LieRingModule L M] [LieRingModule L N] [LieRingModule L P] (f : N →ₗ⁅R,L⁆ P) (g : M →ₗ⁅R,L⁆ N) : ↑(LieModuleHom.comp f g) = ↑f ∘ₗ ↑g

def LieModuleHom.inverse {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (g : N → M) (h₁ : Function.LeftInverse g ⇑f) (h₂ : Function.RightInverse g ⇑f) : N →ₗ⁅R,L⁆ M

The inverse of a bijective morphism of Lie modules is a morphism of Lie modules.

Equations

• LieModuleHom.inverse f g h₁ h₂ = let src := LinearMap.inverse (↑f) g h₁ h₂; { toLinearMap := src, map_lie' := (_ : ∀ {x : L} {n : N}, g ⁅x, n⁆ = ⁅x, g n⁆) }

instance LieModuleHom.instAddLieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : Add (M →ₗ⁅R,L⁆ N)

Equations

• One or more equations did not get rendered due to their size.

instance LieModuleHom.instSubLieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : Sub (M →ₗ⁅R,L⁆ N)

Equations

• One or more equations did not get rendered due to their size.

instance LieModuleHom.instNegLieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : Neg (M →ₗ⁅R,L⁆ N)

Equations

• LieModuleHom.instNegLieModuleHom = { neg := fun (f : M →ₗ⁅R,L⁆ N) => let src := -↑f; { toLinearMap := src, map_lie' := (_ : ∀ (a : L) (a_1 : M), -f ⁅a, a_1⁆ = ⁅a, -f a_1⁆) } }

@[simp]

theorem LieModuleHom.coe_add {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (g : M →ₗ⁅R,L⁆ N) : ⇑(f + g) = ⇑f + ⇑g

theorem LieModuleHom.add_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (g : M →ₗ⁅R,L⁆ N) (m : M) : (f + g) m = f m + g m

@[simp]

theorem LieModuleHom.coe_sub {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (g : M →ₗ⁅R,L⁆ N) : ⇑(f - g) = ⇑f - ⇑g

theorem LieModuleHom.sub_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (g : M →ₗ⁅R,L⁆ N) (m : M) : (f - g) m = f m - g m

@[simp]

theorem LieModuleHom.coe_neg {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) : ⇑(-f) = -⇑f

theorem LieModuleHom.neg_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (m : M) : (-f) m = -f m

instance LieModuleHom.hasNSMul {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : SMul ℕ (M →ₗ⁅R,L⁆ N)

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieModuleHom.coe_nsmul {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (n : ℕ) (f : M →ₗ⁅R,L⁆ N) : ⇑(n • f) = n • ⇑f

theorem LieModuleHom.nsmul_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (n : ℕ) (f : M →ₗ⁅R,L⁆ N) (m : M) : (n • f) m = n • f m

instance LieModuleHom.hasZSMul {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : SMul ℤ (M →ₗ⁅R,L⁆ N)

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieModuleHom.coe_zsmul {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (z : ℤ) (f : M →ₗ⁅R,L⁆ N) : ⇑(z • f) = z • ⇑f

theorem LieModuleHom.zsmul_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (z : ℤ) (f : M →ₗ⁅R,L⁆ N) (m : M) : (z • f) m = z • f m

instance LieModuleHom.instAddCommGroupLieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : AddCommGroup (M →ₗ⁅R,L⁆ N)

Equations

• One or more equations did not get rendered due to their size.

instance LieModuleHom.instSMulLieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] [LieModule R L N] : SMul R (M →ₗ⁅R,L⁆ N)

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieModuleHom.coe_smul {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] [LieModule R L N] (t : R) (f : M →ₗ⁅R,L⁆ N) : ⇑(t • f) = t • ⇑f

theorem LieModuleHom.smul_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] [LieModule R L N] (t : R) (f : M →ₗ⁅R,L⁆ N) (m : M) : (t • f) m = t • f m

instance LieModuleHom.instModuleLieModuleHomToSemiringToCommSemiringToAddCommMonoidInstAddCommGroupLieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [LieAlgebra R L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] [LieModule R L N] : Module R (M →ₗ⁅R,L⁆ N)

Equations

• One or more equations did not get rendered due to their size.

structure LieModuleEquiv (R : Type u) (L : Type v) (M : Type w) (N : Type w₁) [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] extends LieModuleHom : Type (max w w₁)

An equivalence of Lie algebra modules is a linear equivalence which is also a morphism of Lie algebra modules.

• toFun : M → N
• map_add' : ∀ (x y : M), self.toAddHom.toFun (x + y) = self.toAddHom.toFun x + self.toAddHom.toFun y
• map_smul' : ∀ (r : R) (x : M), self.toAddHom.toFun (r • x) = (RingHom.id R) r • self.toAddHom.toFun x
• map_lie' : ∀ {x : L} {m : M}, self.toAddHom.toFun ⁅x, m⁆ = ⁅x, self.toAddHom.toFun m⁆
• invFun : N → M

  The inverse function of an equivalence of Lie modules

• left_inv : Function.LeftInverse self.invFun self.toFun

  The inverse function of an equivalence of Lie modules is a left inverse of the underlying function.

• right_inv : Function.RightInverse self.invFun self.toFun

  The inverse function of an equivalence of Lie modules is a right inverse of the underlying function.

def «term_≃ₗ⁅_,_⁆_» : Lean.TrailingParserDescr

An equivalence of Lie algebra modules is a linear equivalence which is also a morphism of Lie algebra modules.

Equations

• One or more equations did not get rendered due to their size.

def LieModuleEquiv.toLinearEquiv {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : M ≃ₗ[R] N

View an equivalence of Lie modules as a linear equivalence.

Equations

• One or more equations did not get rendered due to their size.

def LieModuleEquiv.toEquiv {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : M ≃ N

View an equivalence of Lie modules as a type level equivalence.

Equations

• LieModuleEquiv.toEquiv e = { toFun := e.toFun, invFun := e.invFun, left_inv := (_ : Function.LeftInverse e.invFun e.toFun), right_inv := (_ : Function.RightInverse e.invFun e.toFun) }

instance LieModuleEquiv.hasCoeToEquiv {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : CoeOut (M ≃ₗ⁅R,L⁆ N) (M ≃ N)

Equations

• LieModuleEquiv.hasCoeToEquiv = { coe := LieModuleEquiv.toEquiv }

instance LieModuleEquiv.hasCoeToLieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : Coe (M ≃ₗ⁅R,L⁆ N) (M →ₗ⁅R,L⁆ N)

Equations

• LieModuleEquiv.hasCoeToLieModuleHom = { coe := LieModuleEquiv.toLieModuleHom }

instance LieModuleEquiv.hasCoeToLinearEquiv {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : CoeOut (M ≃ₗ⁅R,L⁆ N) (M ≃ₗ[R] N)

Equations

• LieModuleEquiv.hasCoeToLinearEquiv = { coe := LieModuleEquiv.toLinearEquiv }

instance LieModuleEquiv.instEquivLikeLieModuleEquiv {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : EquivLike (M ≃ₗ⁅R,L⁆ N) M N

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieModuleEquiv.coe_coe {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : ⇑e.toLieModuleHom = ⇑e

theorem LieModuleEquiv.injective {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : Function.Injective ⇑e

theorem LieModuleEquiv.surjective {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : Function.Surjective ⇑e

@[simp]

theorem LieModuleEquiv.toEquiv_mk {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (g : N → M) (h₁ : Function.LeftInverse g f.toFun) (h₂ : Function.RightInverse g f.toFun) : LieModuleEquiv.toEquiv { toLieModuleHom := f, invFun := g, left_inv := h₁, right_inv := h₂ } = { toFun := ⇑f, invFun := g, left_inv := h₁, right_inv := h₂ }

@[simp]

theorem LieModuleEquiv.coe_mk {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (f : M →ₗ⁅R,L⁆ N) (invFun : N → M) (h₁ : Function.LeftInverse invFun f.toFun) (h₂ : Function.RightInverse invFun f.toFun) : ⇑{ toLieModuleHom := f, invFun := invFun, left_inv := h₁, right_inv := h₂ } = ⇑f

theorem LieModuleEquiv.coe_to_lieModuleHom {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : ⇑e.toLieModuleHom = ⇑e

@[simp]

theorem LieModuleEquiv.coe_to_linearEquiv {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : ⇑(LieModuleEquiv.toLinearEquiv e) = ⇑e

theorem LieModuleEquiv.toEquiv_injective {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : Function.Injective LieModuleEquiv.toEquiv

theorem LieModuleEquiv.ext {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e₁ : M ≃ₗ⁅R,L⁆ N) (e₂ : M ≃ₗ⁅R,L⁆ N) (h : ∀ (m : M), e₁ m = e₂ m) : e₁ = e₂

instance LieModuleEquiv.instOneLieModuleEquiv {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [AddCommGroup M] [Module R M] [LieRingModule L M] : One (M ≃ₗ⁅R,L⁆ M)

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieModuleEquiv.one_apply {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [AddCommGroup M] [Module R M] [LieRingModule L M] (m : M) : 1 m = m

instance LieModuleEquiv.instInhabitedLieModuleEquiv {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [AddCommGroup M] [Module R M] [LieRingModule L M] : Inhabited (M ≃ₗ⁅R,L⁆ M)

Equations

• LieModuleEquiv.instInhabitedLieModuleEquiv = { default := 1 }

def LieModuleEquiv.refl {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [AddCommGroup M] [Module R M] [LieRingModule L M] : M ≃ₗ⁅R,L⁆ M

Lie module equivalences are reflexive.

Equations

• LieModuleEquiv.refl = 1

@[simp]

theorem LieModuleEquiv.refl_apply {R : Type u} {L : Type v} {M : Type w} [CommRing R] [LieRing L] [AddCommGroup M] [Module R M] [LieRingModule L M] (m : M) : LieModuleEquiv.refl m = m

def LieModuleEquiv.symm {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : N ≃ₗ⁅R,L⁆ M

Lie module equivalences are symmetric.

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieModuleEquiv.apply_symm_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) (x : N) : e ((LieModuleEquiv.symm e) x) = x

@[simp]

theorem LieModuleEquiv.symm_apply_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) (x : M) : (LieModuleEquiv.symm e) (e x) = x

theorem LieModuleEquiv.apply_eq_iff_eq_symm_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] {m : M} {n : N} (e : M ≃ₗ⁅R,L⁆ N) : e m = n ↔ m = (LieModuleEquiv.symm e) n

@[simp]

theorem LieModuleEquiv.symm_symm {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : LieModuleEquiv.symm (LieModuleEquiv.symm e) = e

theorem LieModuleEquiv.symm_bijective {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] : Function.Bijective LieModuleEquiv.symm

def LieModuleEquiv.trans {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} {P : Type w₂} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [AddCommGroup P] [Module R M] [Module R N] [Module R P] [LieRingModule L M] [LieRingModule L N] [LieRingModule L P] (e₁ : M ≃ₗ⁅R,L⁆ N) (e₂ : N ≃ₗ⁅R,L⁆ P) : M ≃ₗ⁅R,L⁆ P

Lie module equivalences are transitive.

Equations

• One or more equations did not get rendered due to their size.

@[simp]

theorem LieModuleEquiv.trans_apply {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} {P : Type w₂} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [AddCommGroup P] [Module R M] [Module R N] [Module R P] [LieRingModule L M] [LieRingModule L N] [LieRingModule L P] (e₁ : M ≃ₗ⁅R,L⁆ N) (e₂ : N ≃ₗ⁅R,L⁆ P) (m : M) : (LieModuleEquiv.trans e₁ e₂) m = e₂ (e₁ m)

@[simp]

theorem LieModuleEquiv.symm_trans {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} {P : Type w₂} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [AddCommGroup P] [Module R M] [Module R N] [Module R P] [LieRingModule L M] [LieRingModule L N] [LieRingModule L P] (e₁ : M ≃ₗ⁅R,L⁆ N) (e₂ : N ≃ₗ⁅R,L⁆ P) : LieModuleEquiv.symm (LieModuleEquiv.trans e₁ e₂) = LieModuleEquiv.trans (LieModuleEquiv.symm e₂) (LieModuleEquiv.symm e₁)

@[simp]

theorem LieModuleEquiv.self_trans_symm {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : LieModuleEquiv.trans e (LieModuleEquiv.symm e) = LieModuleEquiv.refl

@[simp]

theorem LieModuleEquiv.symm_trans_self {R : Type u} {L : Type v} {M : Type w} {N : Type w₁} [CommRing R] [LieRing L] [AddCommGroup M] [AddCommGroup N] [Module R M] [Module R N] [LieRingModule L M] [LieRingModule L N] (e : M ≃ₗ⁅R,L⁆ N) : LieModuleEquiv.trans (LieModuleEquiv.symm e) e = LieModuleEquiv.refl