(** *** Transitivity *)

(** Remark: [Rlt_trans] is in Raxioms *)
#[export] Instance Rlt_Transitive : Transitive Rlt | 10 := Rlt_trans.

Lemma Rle_trans : forall r1 r2 r3, r1 <= r2 -> r2 <= r3 -> r1 <= r3.