YES Problem: f(s(x),y) -> f(x,g(x,y)) f(0(),y) -> y g(x,y) -> y Proof: Matrix Interpretation Processor: dim=1 interpretation: [0] = 4, [g](x0, x1) = 4x0 + x1, [f](x0, x1) = 4x0 + x1 + 5, [s](x0) = 2x0 orientation: f(s(x),y) = 8x + y + 5 >= 8x + y + 5 = f(x,g(x,y)) f(0(),y) = y + 21 >= y = y g(x,y) = 4x + y >= y = y problem: f(s(x),y) -> f(x,g(x,y)) g(x,y) -> y Matrix Interpretation Processor: dim=1 interpretation: [g](x0, x1) = x0 + x1 + 1, [f](x0, x1) = x0 + x1 + 7, [s](x0) = 2x0 + 1 orientation: f(s(x),y) = 2x + y + 8 >= 2x + y + 8 = f(x,g(x,y)) g(x,y) = x + y + 1 >= y = y problem: f(s(x),y) -> f(x,g(x,y)) Matrix Interpretation Processor: dim=1 interpretation: [g](x0, x1) = x0 + x1 + 3, [f](x0, x1) = x0 + x1 + 1, [s](x0) = 2x0 + 6 orientation: f(s(x),y) = 2x + y + 7 >= 2x + y + 4 = f(x,g(x,y)) problem: Qed