Schur product operator

In this file we define the Schur product operator and prove some basic properties.

noncomputable def schurMul {B : Type u_1} {C : Type u_2} [starAlgebra B] [starAlgebra C] [hB : QuantumSet B] [hC : QuantumSet C] : (B →ₗ[ℂ] C) →ₗ[ℂ] (B →ₗ[ℂ] C) →ₗ[ℂ] B →ₗ[ℂ] C

Schur product ⬝ •ₛ ⬝ : (B → C) → (B → C) → (B → C) given by x •ₛ y := m ∘ (x ⊗ y) ∘ comul

Equations

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

@[simp]

theorem schurMul_apply_apply {B : Type u_1} {C : Type u_2} [starAlgebra B] [starAlgebra C] [hB : QuantumSet B] [hC : QuantumSet C] (x y : B →ₗ[ℂ] C) : x •ₛ y = LinearMap.mul' ℂ C ∘ₗ TensorProduct.map x y ∘ₗ CoalgebraStruct.comul

def schurMulNotation : Lean.TrailingParserDescr

Schur product ⬝ •ₛ ⬝ : (B → C) → (B → C) → (B → C) given by x •ₛ y := m ∘ (x ⊗ y) ∘ comul

Equations

• schurMulNotation = Lean.ParserDescr.trailingNode `schurMulNotation 80 81 (Lean.ParserDescr.binary `andthen (Lean.ParserDescr.symbol " •ₛ ") (Lean.ParserDescr.cat `term 80))

def schurMulNotation.«delab_app.DFunLike.coe» : Lean.PrettyPrinter.Delaborator.Delab

Pretty printer defined by notation3 command.

Equations

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

theorem schurMul.apply_rankOne {B : Type u_1} {C : Type u_2} [starAlgebra B] [starAlgebra C] [hB : QuantumSet B] [hC : QuantumSet C] (a : B) (b : C) (c : B) (d : C) : ↑(((rankOne ℂ) a) b) •ₛ ↑(((rankOne ℂ) c) d) = ↑(((rankOne ℂ) (a * c)) (b * d))

theorem schurMul.apply_ket {B : Type u_1} [starAlgebra B] [hB : QuantumSet B] (a b : B) : ↑((ket ℂ) a) •ₛ ↑((ket ℂ) b) = ↑((ket ℂ) (a * b))

theorem bra_tmul {𝕜 : Type u_1} {B : Type u_2} {C : Type u_3} [RCLike 𝕜] [NormedAddCommGroup B] [NormedAddCommGroup C] [InnerProductSpace 𝕜 B] [InnerProductSpace 𝕜 C] [FiniteDimensional 𝕜 B] [FiniteDimensional 𝕜 C] (a : B) (b : C) : ↑((bra 𝕜) (a ⊗ₜ[𝕜] b)) = ↑(TensorProduct.lid 𝕜 𝕜) ∘ₗ TensorProduct.map ↑((bra 𝕜) a) ↑((bra 𝕜) b)

theorem bra_map_bra {𝕜 : Type u_1} {B : Type u_2} {C : Type u_3} [RCLike 𝕜] [NormedAddCommGroup B] [NormedAddCommGroup C] [InnerProductSpace 𝕜 B] [InnerProductSpace 𝕜 C] [FiniteDimensional 𝕜 B] [FiniteDimensional 𝕜 C] (a : B) (b : C) : TensorProduct.map ↑((bra 𝕜) a) ↑((bra 𝕜) b) = ↑(TensorProduct.lid 𝕜 𝕜).symm ∘ₗ ↑((bra 𝕜) (a ⊗ₜ[𝕜] b))

theorem ket_tmul {𝕜 : Type u_1} {B : Type u_2} {C : Type u_3} [RCLike 𝕜] [NormedAddCommGroup B] [NormedAddCommGroup C] [InnerProductSpace 𝕜 B] [InnerProductSpace 𝕜 C] [FiniteDimensional 𝕜 B] [FiniteDimensional 𝕜 C] (a : B) (b : C) : ↑((ket 𝕜) (a ⊗ₜ[𝕜] b)) = TensorProduct.map ↑((ket 𝕜) a) ↑((ket 𝕜) b) ∘ₗ ↑(TensorProduct.lid 𝕜 𝕜).symm

theorem ket_map_ket {𝕜 : Type u_1} {B : Type u_2} {C : Type u_3} [RCLike 𝕜] [NormedAddCommGroup B] [NormedAddCommGroup C] [InnerProductSpace 𝕜 B] [InnerProductSpace 𝕜 C] [FiniteDimensional 𝕜 B] [FiniteDimensional 𝕜 C] (a : B) (b : C) : TensorProduct.map ↑((ket 𝕜) a) ↑((ket 𝕜) b) = ↑((ket 𝕜) (a ⊗ₜ[𝕜] b)) ∘ₗ ↑(TensorProduct.lid 𝕜 𝕜)

theorem rankOne_tmul {𝕜 : Type u_1} {B : Type u_2} {C : Type u_3} [RCLike 𝕜] [NormedAddCommGroup B] [NormedAddCommGroup C] [InnerProductSpace 𝕜 B] [InnerProductSpace 𝕜 C] [FiniteDimensional 𝕜 B] [FiniteDimensional 𝕜 C] {A : Type u_4} {D : Type u_5} [NormedAddCommGroup A] [NormedAddCommGroup D] [InnerProductSpace 𝕜 A] [InnerProductSpace 𝕜 D] [FiniteDimensional 𝕜 A] [FiniteDimensional 𝕜 D] (a : A) (b : B) (c : C) (d : D) : ↑(((rankOne 𝕜) (a ⊗ₜ[𝕜] c)) (b ⊗ₜ[𝕜] d)) = TensorProduct.map ↑(((rankOne 𝕜) a) b) ↑(((rankOne 𝕜) c) d)

theorem bra_comp_linearMap {𝕜 : Type u_1} {E₁ : Type u_2} {E₂ : Type u_3} [RCLike 𝕜] [NormedAddCommGroup E₁] [InnerProductSpace 𝕜 E₁] [NormedAddCommGroup E₂] [InnerProductSpace 𝕜 E₂] [FiniteDimensional 𝕜 E₁] [FiniteDimensional 𝕜 E₂] (x : E₂) (f : E₁ →ₗ[𝕜] E₂) : ↑((bra 𝕜) x) ∘ₗ f = ↑((bra 𝕜) ((LinearMap.adjoint f) x))

theorem linearMap_comp_ket {𝕜 : Type u_1} {E₁ : Type u_2} {E₂ : Type u_3} [RCLike 𝕜] [NormedAddCommGroup E₁] [InnerProductSpace 𝕜 E₁] [NormedAddCommGroup E₂] [InnerProductSpace 𝕜 E₂] (x : E₁) (f : E₁ →ₗ[𝕜] E₂) : f ∘ₗ ↑((ket 𝕜) x) = ↑((ket 𝕜) (f x))

theorem mul_comp_lid_symm {R : Type u_1} [CommSemiring R] : LinearMap.mul' R R ∘ₗ ↑(TensorProduct.lid R R).symm = LinearMap.id

theorem schurMul.apply_bra {B : Type u_1} [starAlgebra B] [hB : QuantumSet B] (a b : B) : ↑((bra ℂ) a) •ₛ ↑((bra ℂ) b) = ↑((bra ℂ) (a * b))

theorem schurMul.comp_apply_of {A : Type u_1} {B : Type u_3} {C : Type u_5} [starAlgebra A] [starAlgebra B] [starAlgebra C] [hA : QuantumSet A] [hB : QuantumSet B] [hC : QuantumSet C] (δ : ℂ) (hAδ : CoalgebraStruct.comul ∘ₗ LinearMap.mul' ℂ A = δ • LinearMap.id) (a b : A →ₗ[ℂ] B) (c d : C →ₗ[ℂ] A) : (a •ₛ b) ∘ₗ c •ₛ d = δ • (a ∘ₗ c) •ₛ b ∘ₗ d

theorem schurMul_one_one_right {B : Type u_2} {C : Type u_1} [starAlgebra B] [starAlgebra C] [hB : QuantumSet B] [hC : QuantumSet C] (A : C →ₗ[ℂ] B) : A •ₛ ↑(((rankOne ℂ) 1) 1) = A

theorem schurMul_one_one_left {B : Type u_2} {C : Type u_1} [starAlgebra B] [starAlgebra C] [hB : QuantumSet B] [hC : QuantumSet C] (A : C →ₗ[ℂ] B) : ↑(((rankOne ℂ) 1) 1) •ₛ A = A

theorem schurMul_adjoint {B : Type u_1} {C : Type u_2} [starAlgebra B] [starAlgebra C] [hB : QuantumSet B] [hC : QuantumSet C] (x y : B →ₗ[ℂ] C) : LinearMap.adjoint (x •ₛ y) = LinearMap.adjoint x •ₛ LinearMap.adjoint y

theorem schurMul_real {A : Type u_1} {B : Type u_2} [starAlgebra A] [starAlgebra B] [hA : QuantumSet A] [hB : QuantumSet B] (x y : A →ₗ[ℂ] B) : (x •ₛ y).real = y.real •ₛ x.real

theorem schurMul_one_right_rankOne {B : Type u_1} [starAlgebra B] [hB : QuantumSet B] (a b : B) : ↑(((rankOne ℂ) a) b) •ₛ 1 = lmul a * LinearMap.adjoint (lmul b)

theorem schurMul_one_left_rankOne {B : Type u_1} [starAlgebra B] [hB : QuantumSet B] (a b : B) : 1 •ₛ ↑(((rankOne ℂ) a) b) = rmul a * LinearMap.adjoint (rmul b)

theorem Psi.schurMul {A : Type u_1} {B : Type u_2} [starAlgebra A] [starAlgebra B] [hA : QuantumSet A] [hB : QuantumSet B] (r₁ r₂ : ℝ) (f g : A →ₗ[ℂ] B) : (QuantumSet.Psi r₁ r₂) (f •ₛ g) = (QuantumSet.Psi r₁ r₂) f * (QuantumSet.Psi r₁ r₂) g

theorem schurMul_assoc {A : Type u_1} {B : Type u_2} [starAlgebra A] [starAlgebra B] [hA : QuantumSet A] [hB : QuantumSet B] (f g h : A →ₗ[ℂ] B) : (f •ₛ g) •ₛ h = f •ₛ g •ₛ h

theorem nonUnitalAlgHom_comp_mul {R : Type u_1} {A : Type u_2} {B : Type u_3} [CommSemiring R] [Semiring A] [Semiring B] [Algebra R A] [Algebra R B] (f : A →ₙₐ[R] B) : f.toLinearMap ∘ₗ LinearMap.mul' R A = LinearMap.mul' R B ∘ₗ TensorProduct.map f.toLinearMap f.toLinearMap

theorem algHom_comp_mul {R : Type u_1} {A : Type u_2} {B : Type u_3} [CommSemiring R] [Semiring A] [Semiring B] [Algebra R A] [Algebra R B] (f : A →ₐ[R] B) : f.toLinearMap ∘ₗ LinearMap.mul' R A = LinearMap.mul' R B ∘ₗ TensorProduct.map f.toLinearMap f.toLinearMap

theorem comul_comp_nonUnitalAlgHom_adjoint {A : Type u_1} {B : Type u_2} [starAlgebra A] [starAlgebra B] [hA : QuantumSet A] [hB : QuantumSet B] (f : A →ₙₐ[ℂ] B) : CoalgebraStruct.comul ∘ₗ LinearMap.adjoint f.toLinearMap = TensorProduct.map (LinearMap.adjoint f.toLinearMap) (LinearMap.adjoint f.toLinearMap) ∘ₗ CoalgebraStruct.comul

theorem comul_comp_algHom_adjoint {A : Type u_1} {B : Type u_2} [starAlgebra A] [starAlgebra B] [hA : QuantumSet A] [hB : QuantumSet B] (f : A →ₐ[ℂ] B) : CoalgebraStruct.comul ∘ₗ LinearMap.adjoint f.toLinearMap = TensorProduct.map (LinearMap.adjoint f.toLinearMap) (LinearMap.adjoint f.toLinearMap) ∘ₗ CoalgebraStruct.comul

theorem schurMul_nonUnitalAlgHom_comp_coalgHom {A : Type u_5} {B : Type u_6} {C : Type u_3} [starAlgebra A] [starAlgebra B] [starAlgebra C] [hA : QuantumSet A] [hB : QuantumSet B] [hC : QuantumSet C] {D : Type u_1} [starAlgebra D] [hD : QuantumSet D] (g : C →ₙₐ[ℂ] D) (f : A →ₗc[ℂ] B) (x y : B →ₗ[ℂ] C) : (g.toLinearMap ∘ₗ x ∘ₗ f.toLinearMap) •ₛ g.toLinearMap ∘ₗ y ∘ₗ f.toLinearMap = g.toLinearMap ∘ₗ (x •ₛ y) ∘ₗ f.toLinearMap

theorem schurMul_algHom_comp_coalgHom {A : Type u_4} {B : Type u_5} {C : Type u_3} [starAlgebra A] [starAlgebra B] [starAlgebra C] [hA : QuantumSet A] [hB : QuantumSet B] [hC : QuantumSet C] {D : Type u_1} [starAlgebra D] [hD : QuantumSet D] (g : C →ₐ[ℂ] D) (f : A →ₗc[ℂ] B) (x y : B →ₗ[ℂ] C) : (g.toLinearMap ∘ₗ x ∘ₗ f.toLinearMap) •ₛ g.toLinearMap ∘ₗ y ∘ₗ f.toLinearMap = g.toLinearMap ∘ₗ (x •ₛ y) ∘ₗ f.toLinearMap

theorem schurMul_nonUnitalAlgHom_comp_nonUnitalAlgHom_adjoint {A : Type u_6} {B : Type u_5} {C : Type u_3} [starAlgebra A] [starAlgebra B] [starAlgebra C] [hA : QuantumSet A] [hB : QuantumSet B] [hC : QuantumSet C] {D : Type u_1} [starAlgebra D] [hD : QuantumSet D] (g : C →ₙₐ[ℂ] D) (f : B →ₙₐ[ℂ] A) (x y : B →ₗ[ℂ] C) : (g.toLinearMap ∘ₗ x ∘ₗ LinearMap.adjoint f.toLinearMap) •ₛ g.toLinearMap ∘ₗ y ∘ₗ LinearMap.adjoint f.toLinearMap = g.toLinearMap ∘ₗ (x •ₛ y) ∘ₗ LinearMap.adjoint f.toLinearMap

theorem schurMul_algHom_comp_algHom_adjoint {A : Type u_5} {B : Type u_4} {C : Type u_3} [starAlgebra A] [starAlgebra B] [starAlgebra C] [hA : QuantumSet A] [hB : QuantumSet B] [hC : QuantumSet C] {D : Type u_1} [starAlgebra D] [hD : QuantumSet D] (g : C →ₐ[ℂ] D) (f : B →ₐ[ℂ] A) (x y : B →ₗ[ℂ] C) : (g.toLinearMap ∘ₗ x ∘ₗ LinearMap.adjoint f.toLinearMap) •ₛ g.toLinearMap ∘ₗ y ∘ₗ LinearMap.adjoint f.toLinearMap = g.toLinearMap ∘ₗ (x •ₛ y) ∘ₗ LinearMap.adjoint f.toLinearMap

theorem schurMul_one_iff_one_schurMul_of_isReal {A : Type u_1} {B : Type u_2} [starAlgebra A] [starAlgebra B] [hA : QuantumSet A] [hB : QuantumSet B] {x y z : A →ₗ[ℂ] B} (hx : LinearMap.IsReal x) (hy : LinearMap.IsReal y) (hz : LinearMap.IsReal z) : x •ₛ y = z ↔ y •ₛ x = z

theorem schurMul_reflexive_of_isReal {A : Type u_1} [starAlgebra A] [hA : QuantumSet A] {x : A →ₗ[ℂ] A} (hx : LinearMap.IsReal x) : x •ₛ 1 = 1 ↔ 1 •ₛ x = 1

theorem schurMul_irreflexive_of_isReal {A : Type u_1} [starAlgebra A] [hA : QuantumSet A] {x : A →ₗ[ℂ] A} (hx : LinearMap.IsReal x) : x •ₛ 1 = 0 ↔ 1 •ₛ x = 0

theorem schurIdempotent_iff_Psi_isIdempotentElem {A : Type u_1} {B : Type u_2} [starAlgebra A] [starAlgebra B] [hA : QuantumSet A] [QuantumSet B] (f : A →ₗ[ℂ] B) (t r : ℝ) : f •ₛ f = f ↔ IsIdempotentElem ((QuantumSet.Psi t r) f)