Lemma ismodulefun_pr1 {R : ring} {M : module R} (A : submodule M) : @ismodulefun R A M pr1. Proof. use make_ismodulefun. exact (pr1 (ismonoidfun_pr1 A)). intros r a. reflexivity. Defined.
Require Import UniMath.MoreFoundations.Subtypes. Require Import UniMath.Algebra.RigsAndRings. Require Import UniMath.Algebra.Monoids. Require Import UniMath.Algebra.Groups. Require Import UniMath.Algebra.Modules.Core.