mapDomainRingHom_id — Mathlib

English

Composition compatibility: mapDomainRingHom R (f ∘ g) = (mapDomainRingHom R f) ∘ (mapDomainRingHom R g).

Русский

Сохранение композиции: mapDomainRingHom R (f ∘ g) = (mapDomainRingHom R f) ∘ (mapDomainRingHom R g).

LaTeX

$$$ mapDomainRingHom R (f \circ g) = (mapDomainRingHom R f) \circ (mapDomainRingHom R g) $$$

Lean4

@[to_additive (dont_translate := R) (attr := simp)]
theorem mapDomainRingHom_id : mapDomainRingHom R (MonoidHom.id M) = .id (MonoidAlgebra R M) := by ext <;> simp

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