YES Problem: g(s(x)) -> f(x) f(0()) -> s(0()) f(s(x)) -> s(s(g(x))) g(0()) -> 0() Proof: DP Processor: DPs: g#(s(x)) -> f#(x) f#(s(x)) -> g#(x) TRS: g(s(x)) -> f(x) f(0()) -> s(0()) f(s(x)) -> s(s(g(x))) g(0()) -> 0() Usable Rule Processor: DPs: g#(s(x)) -> f#(x) f#(s(x)) -> g#(x) TRS: Arctic Interpretation Processor: dimension: 1 usable rules: interpretation: [f#](x0) = x0, [g#](x0) = x0 + -16, [s](x0) = 1x0 + -2 orientation: g#(s(x)) = 1x + -2 >= x = f#(x) f#(s(x)) = 1x + -2 >= x + -16 = g#(x) problem: DPs: TRS: Qed