star on pi types

We put a Star structure on pi types that operates elementwise, such that it describes the complex conjugation of vectors.

instance Pi.instStarForall {I : Type u} {f : I → Type v} [(i : I) → Star (f i)] : Star ((i : I) → f i)

Equations

• Pi.instStarForall = { star := fun (x : (i : I) → f i) (i : I) => star (x i) }

@[simp]

theorem Pi.star_apply {I : Type u} {f : I → Type v} [(i : I) → Star (f i)] (x : (i : I) → f i) (i : I) : star x i = star (x i)

theorem Pi.star_def {I : Type u} {f : I → Type v} [(i : I) → Star (f i)] (x : (i : I) → f i) : star x = fun (i : I) => star (x i)

instance Pi.instTrivialStarForall {I : Type u} {f : I → Type v} [(i : I) → Star (f i)] [∀ (i : I), TrivialStar (f i)] : TrivialStar ((i : I) → f i)

instance Pi.instInvolutiveStarForall {I : Type u} {f : I → Type v} [(i : I) → InvolutiveStar (f i)] : InvolutiveStar ((i : I) → f i)

Equations

• Pi.instInvolutiveStarForall = { toStar := Pi.instStarForall, star_involutive := ⋯ }

instance Pi.instStarMulForall {I : Type u} {f : I → Type v} [(i : I) → Mul (f i)] [(i : I) → StarMul (f i)] : StarMul ((i : I) → f i)

Equations

• Pi.instStarMulForall = { toInvolutiveStar := Pi.instInvolutiveStarForall, star_mul := ⋯ }

instance Pi.instStarAddMonoidForall {I : Type u} {f : I → Type v} [(i : I) → AddMonoid (f i)] [(i : I) → StarAddMonoid (f i)] : StarAddMonoid ((i : I) → f i)

Equations

• Pi.instStarAddMonoidForall = { toInvolutiveStar := Pi.instInvolutiveStarForall, star_add := ⋯ }

instance Pi.instStarRingForall {I : Type u} {f : I → Type v} [(i : I) → NonUnitalSemiring (f i)] [(i : I) → StarRing (f i)] : StarRing ((i : I) → f i)

Equations

• Pi.instStarRingForall = { toStarMul := Pi.instStarMulForall, star_add := ⋯ }

instance Pi.instStarModuleForall {I : Type u} {f : I → Type v} {R : Type w} [(i : I) → SMul R (f i)] [Star R] [(i : I) → Star (f i)] [∀ (i : I), StarModule R (f i)] : StarModule R ((i : I) → f i)

theorem Pi.single_star {I : Type u} {f : I → Type v} [(i : I) → AddMonoid (f i)] [(i : I) → StarAddMonoid (f i)] [DecidableEq I] (i : I) (a : f i) : single i (star a) = star (single i a)

@[simp]

theorem Pi.conj_apply {ι : Type u_1} {α : ι → Type u_2} [(i : ι) → CommSemiring (α i)] [(i : ι) → StarRing (α i)] (f : (i : ι) → α i) (i : ι) : (starRingEnd ((i : ι) → α i)) f i = (starRingEnd (α i)) (f i)

theorem Function.update_star {I : Type u} {f : I → Type v} [(i : I) → Star (f i)] [DecidableEq I] (h : (i : I) → f i) (i : I) (a : f i) : update (star h) i (star a) = star (update h i a)

theorem Function.star_sumElim {I : Type u_1} {J : Type u_2} {α : Type u_3} (x : I → α) (y : J → α) [Star α] : star (Sum.elim x y) = Sum.elim (star x) (star y)

@[deprecated Function.star_sumElim (since := "2025-02-21")]

theorem Function.star_sum_elim {I : Type u_1} {J : Type u_2} {α : Type u_3} (x : I → α) (y : J → α) [Star α] : star (Sum.elim x y) = Sum.elim (star x) (star y)

Alias of Function.star_sumElim.