MAYBE 0.08/0.18 MAYBE 0.08/0.18 0.08/0.18 Problem: 0.08/0.18 plus(x,0()) -> x 0.08/0.18 plus(x,s(y)) -> s(plus(x,y)) 0.08/0.18 times(0(),y) -> 0() 0.08/0.18 times(x,0()) -> 0() 0.08/0.18 times(s(x),y) -> plus(times(x,y),y) 0.08/0.18 p(s(s(x))) -> s(p(s(x))) 0.08/0.18 p(s(0())) -> 0() 0.08/0.18 fac(s(x)) -> times(fac(p(s(x))),s(x)) 0.08/0.18 0.08/0.18 Proof: 0.08/0.18 Open 0.08/0.18 EOF