TRS: { from(X) -> cons(X, from(s(X))), 2ndspos(0(), Z) -> rnil(), 2ndspos(s(N), cons(X, Z)) -> 2ndspos(s(N), cons2(X, Z)), 2ndspos(s(N), cons2(X, cons(Y, Z))) -> rcons(posrecip(Y), 2ndsneg(N, Z)), 2ndsneg(0(), Z) -> rnil(), 2ndsneg(s(N), cons(X, Z)) -> 2ndsneg(s(N), cons2(X, Z)), 2ndsneg(s(N), cons2(X, cons(Y, Z))) -> rcons(negrecip(Y), 2ndspos(N, Z)), pi(X) -> 2ndspos(X, from(0())), plus(0(), Y) -> Y, plus(s(X), Y) -> s(plus(X, Y)), times(0(), Y) -> 0(), times(s(X), Y) -> plus(Y, times(X, Y)), square(X) -> times(X, X)} Fail