MAYBE MAYBE TRS: { *(X, +(Y, 1())) -> +(*(X, +(Y, *(1(), 0()))), X), *(X, 1()) -> X, *(X, 0()) -> X, *(X, 0()) -> 0() } DUP: We consider a duplicating system. Trs: { *(X, +(Y, 1())) -> +(*(X, +(Y, *(1(), 0()))), X), *(X, 1()) -> X, *(X, 0()) -> X, *(X, 0()) -> 0() } Fail