English
Let e be a homeomorphism X ≃ₜ Y. Then there is a RingEquiv between LocallyConstant X Z and LocallyConstant Y Z given by transporting locally constant functions along e.
Русский
Пусть e — гомеоморфизм X ≃ₜ Y. Тогда существует кольцевой эквивалент между LocallyConstant X Z и LocallyConstant Y Z, получаемый переносом локально константных функций вдоль e.
LaTeX
$$$\text{LocallyConstant}(X,Z) \cong_{\text{Ring}} \text{LocallyConstant}(Y,Z) \quad \text{via } e,$$$
Lean4
instance instStarRing [StarRing R] [ContinuousStar R] : StarRing C(X, R)₀
where
star f := ⟨star f, by simp⟩
star_involutive _ := ext fun _ ↦ star_star _
star_mul _ _ := ext fun _ ↦ star_mul ..
star_add _ _ := ext fun _ ↦ star_add ..