proposition: Lemma transitive A B C (Ra: relation A) (Rb: relation B) (Rc: relation C) (a:A) (b:B) (c:C) `{!Transitive Ra}: R Ra a _ Rb b → R Rb b _ Rc c → R Ra a _ Rc c.
proof: Proof. destruct 1. destruct 1. apply relate. transitivity y; assumption. Qed.
imports: Relation_Definitions Setoid Unicode.Utf8 Utf8_core