fact: Definition nat_mult_perm120 : ∏ n0 n1 n2, n0 * n1 * n2 = n2 * n0 * n1 := λ n0 n1 n2, pathscomp0 (natmultcomm (n0 * n1) n2) (pathsinv0 (natmultassoc n2 n0 n1)).
imports: UniMath.Foundations.NaturalNumbers UniMath.Tactics.Utilities UniMath.Tactics.Abmonoids_Tactics