Definition isinv' {X : hSet} (x1 : X) (op : binop X) (exinv : hsubtype X) (inv : carrier_subset exinv -> X) := islinv' x1 op exinv inv × isrinv' x1 op exinv inv.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.Sets. Require Import UniMath.MoreFoundations.Orders. Require Import UniMath.Algebra.BinaryOperations