fact: Definition Diamond (a a' : A) (b b' : B) := PathSquare (jglue a b) (jglue a' b')^ (jglue a b') (jglue a' b)^.
imports: Basics Types Cubical NullHomotopy Extensions Colimits.Pushout Truncations.Core Truncations.Connectedness Pointed.Core WildCat Spaces.Nat.Core