instNonUnitalCommSemiring — Mathlib

English

If Y is a NonUnitalCommSemiring, LocallyConstant X Y inherits a NonUnitalCommSemiring with pointwise addition and multiplication.

Русский

Если Y — немонадная коммутативная полусемирия, LocallyConstant X Y наследует NonUnitalCommSemiring по точкам.

LaTeX

$$$\text{LocallyConstant}(X,Y)\text{ is a NonUnitalCommSemiring with } (f+g)(x)=f(x)+g(x), (f\cdot g)(x)=f(x)g(x).$$$

Lean4

instance [NonUnitalCommSemiring Y] : NonUnitalCommSemiring (LocallyConstant X Y) :=
  Function.Injective.nonUnitalCommSemiring DFunLike.coe DFunLike.coe_injective' rfl (fun _ _ => rfl) (fun _ _ => rfl)
    (fun _ _ => rfl)

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