MAYBE
0.08/0.18	MAYBE
0.08/0.18	
0.08/0.18	Problem:
0.08/0.18	 min(x,0()) -> 0()
0.08/0.18	 min(0(),y) -> 0()
0.08/0.18	 min(s(x),s(y)) -> s(min(x,y))
0.08/0.18	 max(x,0()) -> x
0.08/0.18	 max(0(),y) -> y
0.08/0.18	 max(s(x),s(y)) -> s(max(x,y))
0.08/0.18	 -(x,0()) -> x
0.08/0.18	 -(s(x),s(y)) -> -(x,y)
0.08/0.18	 gcd(s(x),s(y)) -> gcd(-(s(max(x,y)),s(min(x,y))),s(min(x,y)))
0.08/0.18	
0.08/0.18	Proof:
0.08/0.18	 Open
0.08/0.18	EOF