fact: Definition inv_lfun aT rT (f : 'Hom(aT, rT)) := Hom (pinvmx (f2mx f)).
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop finfun tuple) mathcomp(ssralg matrix mxalgebra zmodp)