proposition: Lemma bigcup_ointsub0 q : bigcup_ointsub set0 q = set0.
proof: Proof. by rewrite /bigcup_ointsub ointsub_rat0 bigcup_set0. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrint ssrnum finmap matrix) mathcomp(rat interval zmodp vector fieldext falgebra) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality set_interval Rstruct) ereal reals signed topology prodnormedzmodule