Definition GreatestLowerBound (E : hsubtype X) : UU := ∑ glb : X, isGreatestLowerBound E glb.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.Sets. Require Import UniMath.MoreFoundations.Orders. Require Import UniMath.Algebra.BinaryOperations