English
Taking comaps along the opposite-structure linear equivalence commutes with taking powers of Submodules: comap (opLinearEquiv R).symm (M^n) = comap (opLinearEquiv R).symm M^n.
Русский
Сопоставление через обратную структуру линейного эквивалента commuting с возведением подмодулей в степень: comap (opLinearEquiv R).symm (M^n) = comap (opLinearEquiv R).symm M^n.
LaTeX
$$$\mathrm{comap}( (\mathrm{opLinearEquiv}^R)^{-1} , M^n) = \mathrm{comap}( (\mathrm{opLinearEquiv}^R)^{-1} , M)^n$$$
Lean4
protected theorem map_pow {A'} [Semiring A'] [Algebra R A'] (f : A →ₐ[R] A') (n : ℕ) :
map f.toLinearMap (M ^ n) = map f.toLinearMap M ^ n :=
map_pow (mapHom f) M n