proposition: Lemma ger0P x : ger0_xor_lt0 x (min 0 x) (min x 0) (max 0 x) (max x 0) `|x| (x < 0) (0 <= x).
proof: Proof. exact: real_ge0P. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)