Lemma iscontrtozero_module (M : mod_category) : iscontr (mod_category⟦M, zero_module R⟧). Proof. refine (unelmodulefun _ _,, _). intros f; apply modulefun_paths. apply funextfun. exact (fun x => isProofIrrelevantUnit _ _). Defined.
Require Import UniMath.Algebra.Groups. Require Import UniMath.Algebra.RigsAndRings. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.Core.Univalence. Require Import UniMath.Algebra.Modules. Require Import UniMath.Algebra.Modules.Examples. Require Import UniMath.CategoryTheory.Limits.Zero.