English
The composition of quotient equivalences corresponds to the quotient equivalence of the composed isomorphisms: equivZPow(e) and equivZPow(d) compose to equivZPow(e ∘ d).
Русский
Компоновка эквивалентностей по z-пowers соответствует эквивалентности для композиции изоморфизмов.
LaTeX
$$$(\\mathrm{equivQuotientZPowOfEquiv}\,e\,n)\\circ(\\mathrm{equivQuotientZPowOfEquiv}\\,d\,n)=\\mathrm{equivQuotientZPowOfEquiv}\\,(e\\circ d)\,n$$$
Lean4
@[to_additive (attr := simp)]
theorem equivQuotientZPowOfEquiv_trans :
(equivQuotientZPowOfEquiv e n).trans (equivQuotientZPowOfEquiv d n) = equivQuotientZPowOfEquiv (e.trans d) n :=
by
ext x
rw [← Quotient.out_eq' x]
rfl