YES Problem: g(f(x),y) -> f(h(x,y)) h(x,y) -> g(x,f(y)) Proof: DP Processor: DPs: g#(f(x),y) -> h#(x,y) h#(x,y) -> g#(x,f(y)) TRS: g(f(x),y) -> f(h(x,y)) h(x,y) -> g(x,f(y)) Usable Rule Processor: DPs: g#(f(x),y) -> h#(x,y) h#(x,y) -> g#(x,f(y)) TRS: Arctic Interpretation Processor: dimension: 1 usable rules: interpretation: [h#](x0, x1) = 2x0, [g#](x0, x1) = 1x0, [f](x0) = 6x0 orientation: g#(f(x),y) = 7x >= 2x = h#(x,y) h#(x,y) = 2x >= 1x = g#(x,f(y)) problem: DPs: TRS: Qed