proposition: Lemma gtr0_real x : 0 < x -> x \is real.
proof: Proof. by move=> /ltW/ger0_real. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)