proposition: Lemma Z_of_intK : pcancel Z_of_int (some \o int_of_Z).
proof: Proof. by rewrite /Z_of_int /int_of_Z => [[[]|]]. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq) mathcomp(path choice fintype tuple finset bigop order) mathcomp(ssralg zmodp ssrnum ssrint) CoqEAL(hrel param refinements pos)