Lemma isapropislinear {R : ring} {M N : module R} (f : M -> N) : isaprop (islinear f). Proof. apply (impred 1 _). intro r. apply (impred 1 _). intro x. apply (setproperty N). Defined.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.Algebra.RigsAndRings. Require Import UniMath.Algebra.Groups. Require Import UniMath.Algebra.Monoids.