`{Funext} {R : Ring} {M N : RightModule R} (f : M $-> N) : QuotientRightModule M (rm_kernel f) ≅ rm_image f := lm_first_iso (R:=rng_op R) f.
Require Import WildCat. Require Import Spaces.Nat.Core. Require Import Classes.interfaces.canonical_names. Require Import Algebra.Groups.Kernel Algebra.Groups.Image Algebra.Groups.QuotientGroup. Require Import Algebra.AbGroups.AbelianGroup Algebra.AbGroups.Biproduct. Require Import Rings.Ring.