proposition: Lemma restr_eq_elim A (r : relation A) B (f: A -> B) (R: forall x y, r x y -> f x = f y) : restr_eq_rel f r ≡ r.
proof: Proof. u. Qed.
imports: Program.Basics Arith micromega.Lia Permutation List Setoid HahnBase HahnList HahnRelationsBasic HahnSets