MAYBE 0.07/0.18 MAYBE 0.07/0.18 0.07/0.18 Problem: 0.07/0.18 lt(0(),s(x)) -> true() 0.07/0.18 lt(x,0()) -> false() 0.07/0.18 lt(s(x),s(y)) -> lt(x,y) 0.07/0.18 fac(x) -> help(x,0()) 0.07/0.18 help(x,c) -> if(lt(c,x),x,c) 0.07/0.18 if(true(),x,c) -> times(s(c),help(x,s(c))) 0.07/0.18 if(false(),x,c) -> s(0()) 0.07/0.18 0.07/0.18 Proof: 0.07/0.18 Open 0.07/0.18 EOF