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

Lemma mono_sym_in11 : {in aD & aD', {mono f : x y / aR x y >-> rR x y}} -> {in aD' & aD, {mono f : y x / aR x y >-> rR x y}}.