fact: Definition negforall_to_existsneg_restricted (H_LEM : LEM) {X:UU} {A B : hsubtype X} : ¬ (∀ x, A x ⇒ B x) ⇒ ∃ x, A x ∧ ¬ B x.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.Combinatorics.WellOrderedSets UniMath.OrderTheory.DCPOs.AlternativeDefinitions.Dcpo