proposition: Lemma isapropismodulefun {R : ring} {M N : module R} (f : M -> N) : isaprop (ismodulefun f).
proof: Proof. exact (@isofhleveldirprod 1 (isbinopfun f) (islinear f) (isapropisbinopfun f) (isapropislinear f)). Defined.
imports: UniMath.MoreFoundations.Tactics UniMath.Algebra.RigsAndRings UniMath.Algebra.Groups UniMath.Algebra.Monoids