proposition: Lemma recip_irrelevant x Px1 Px2 : // x↾Px1 = // x↾Px2.
proof: Proof. now apply recip_proper_alt. Qed.
imports: Coq.setoid_ring.Ring MathClasses.interfaces.abstract_algebra MathClasses.theory.strong_setoids MathClasses.theory.rings