#[deprecated(since="Coq 8.16", note="Use mono1W_in instead.")]
Notation mono2W_in := mono1W_in.

Lemma monoRL_in : {in aD &, {mono f : x y / aR x y >-> rR x y}} -> {in rD & aD, forall x y, rR x (f y) = aR (g x) y}.