English
The range of mapAlgHom is described by the coefficients lying in the range of f when viewed in the coefficient ring.
Русский
Диапазон mapAlgHom описывается коэффициентами, лежащими в диапазоне f в кольце коэффициентов.
LaTeX
$$$\\mathrm{range}(\\\\mathrm{mapAlgHom} f).\\\\toSubmodule = \\\\mathrm{coeffsIn} σ f.range.\\\\toSubmodule$$$
Lean4
@[simp]
theorem mapAlgHom_coe_ringHom [CommSemiring S₂] [Algebra R S₁] [Algebra R S₂] (f : S₁ →ₐ[R] S₂) :
↑(mapAlgHom f : _ →ₐ[R] MvPolynomial σ S₂) = (map ↑f : MvPolynomial σ S₁ →+* MvPolynomial σ S₂) :=
RingHom.mk_coe _ _ _ _ _