proposition: Lemma zero_inum_subproof : Itv.spec `[0, 0] (0 : R).
proof: Proof. by rewrite /Itv.itv_cond/= inE. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool) mathcomp(ssrnat eqtype choice order ssralg ssrnum ssrint) mathcomp(interval) mathcomp(mathcomp_extra boolp) signed