English
For AddZeroClass α and MulOneClass β and any f: Multiplicative α →* β, the underlying function of the additive reinterpretation equals the composition of the standard coercions with f.
Русский
Для AddZeroClass α и MulOneClass β и любого f: Multiplicative α →* β, базовая функция аддитивного преобразования равна композиции обычных отображений с f.
LaTeX
$$$\\bigl(\\text{toAdditiveRight } f\\bigr) = \\operatorname{ofMul} \\circ f \\circ \\operatorname{ofAdd}$$$
Lean4
@[simp, norm_cast]
theorem coe_toAdditiveRight [AddZeroClass α] [MulOneClass β] (f : Multiplicative α →* β) :
⇑(toAdditiveRight f) = ofMul ∘ f ∘ ofAdd :=
rfl