{R S : Ring} : RingHomomorphism R S -> GroupHomomorphism R S := fun f => @Build_GroupHomomorphism R S f _.
Require Import WildCat. Require Import Spaces.Nat.Core Spaces.Nat.Arithmetic. Require Import Classes.interfaces.abstract_algebra. Require Import Algebra.Groups.Group Algebra.Groups.Subgroup. Require Import Modalities.ReflectiveSubuniverse.