proposition: Lemma poweRNyr r : r != 0%R -> -oo `^ r = 0.
proof: Proof. by move=> r0 /=; rewrite (negbTE r0). Qed.
imports: mathcomp(all_ssreflect ssralg ssrint ssrnum matrix) mathcomp(interval rat) mathcomp(boolp classical_sets functions) mathcomp(mathcomp_extra) reals ereal signed topology normedtype landau sequences derive realfun itv convex