fact: Definition is_equivariant {G:gr} {X Y:Action G} (f:X->Y) : hProp := (∀ g x, f (g*x) = g*(f x))%logic.
imports: UniMath.Foundations.All UniMath.MoreFoundations.Propositions UniMath.MoreFoundations.Notations UniMath.MoreFoundations.Univalence UniMath.MoreFoundations.Tactics UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.Combinatorics.OrderedSets