fact: Definition ger_leVge x y : 0 <= x -> 0 <= y -> (x <= y) || (y <= x) := @ger_leVge R x y.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)