Definition zero_module (R : ring) : module R. Proof. refine (unitabgr,, _). apply (@mult_to_module_struct _ _ (λ _ u, u)); 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.