fact: Definition issubmodule_is {R : ring} {M : module R} (A : hsubtype M) : UU := issubgr A × issubsetwithsmul (module_mult M) A.
imports: UniMath.MoreFoundations.Subtypes UniMath.Algebra.RigsAndRings UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.Algebra.Modules.Core