Definition isAssociative_fun := ∏ n (m:stn n → nat) (x : ∏ i (j:stn (m i)), X), iterop_fun (StandardFiniteSets.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.Algebra.Groups. Require Import UniMath.MoreFoundations.NegativePropositions.