fact: Definition nat_mult_perm201 : ∏ n0 n1 n2, n0 * n1 * n2 = n1 * n2 * n0 := λ n0 n1 n2, pathscomp0 (natmultassoc n0 n1 n2) (natmultcomm n0 (n1 * n2)).
imports: UniMath.Foundations.NaturalNumbers UniMath.Tactics.Utilities UniMath.Tactics.Abmonoids_Tactics