proposition: Lemma ltcE ltc_x x_cut : ltc (@Cut ltc_x x_cut) = ltc_x.
proof: Proof. by []. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq order) mathcomp(ssralg ssrnum ssrint rat) fourcolor(real) Coq(Setoid Morphisms)