proposition: Lemma one_test: is_test (1:X).
proof: Proof. constructor. by rewrite -{1}par11 -{2}cnv1 -A10 dotx1 par11. Qed.
imports: HB(structures) Coq(Setoid Morphisms) mathcomp(all_ssreflect) GraphTheory(edone preliminaries setoid_bigop structures)