Definition idfun_linear {R : ring} (M : module R) : islinear (idfun M). Proof. easy. Defined.
Require Import UniMath.Algebra.Modules.Core. Require Import UniMath.Algebra.Modules.Multimodules. Require Import UniMath.Algebra.Monoids. Require Import UniMath.Algebra.Groups. Require Import UniMath.Algebra.RigsAndRings. Require Import UniMath.Foundations.Preamble. Require Import UniMath.MoreFoundations.Tactics.