YES Problem: h(f(x),y) -> f(g(x,y)) g(x,y) -> h(x,y) Proof: Matrix Interpretation Processor: dim=1 interpretation: [g](x0, x1) = 2x0 + 2x1 + 1, [h](x0, x1) = 2x0 + 2x1, [f](x0) = x0 + 1 orientation: h(f(x),y) = 2x + 2y + 2 >= 2x + 2y + 2 = f(g(x,y)) g(x,y) = 2x + 2y + 1 >= 2x + 2y = h(x,y) problem: h(f(x),y) -> f(g(x,y)) Matrix Interpretation Processor: dim=3 interpretation: [1 0 0] [1 0 0] [g](x0, x1) = [0 0 0]x0 + [0 0 0]x1 [0 0 0] [0 0 0] , [1 0 0] [1 0 0] [1] [h](x0, x1) = [0 0 0]x0 + [0 0 0]x1 + [0] [0 0 0] [0 0 0] [0], [1 0 0] [f](x0) = [0 0 0]x0 [0 0 0] orientation: [1 0 0] [1 0 0] [1] [1 0 0] [1 0 0] h(f(x),y) = [0 0 0]x + [0 0 0]y + [0] >= [0 0 0]x + [0 0 0]y = f(g(x,y)) [0 0 0] [0 0 0] [0] [0 0 0] [0 0 0] problem: Qed