proposition: Lemma segment_construction : segment_constructionP Point bet' cong'.
proof: Proof. by move=> a b; exists b; rewrite /bet' /cong' bet_axx eqxx. Qed.
imports: mathcomp.ssreflect.ssreflect mathcomp(ssrbool ssrfun ssrnat eqtype choice seq) mathcomp(fintype finset finfun bigop order) mathcomp(ssralg ssrnum path generic_quotient matrix mxalgebra) mathcomp(zmodp) mathcomp(tuple fintype bigop) GeoCoq.Meta_theory.Models.POF_to_Tarski GeoCoq.Meta_theory.Counter_models.Planar.independence