YES Problem: g(x,y) -> x g(x,y) -> y f(s(x),y,y) -> f(y,x,s(x)) Proof: Matrix Interpretation Processor: dim=1 interpretation: [f](x0, x1, x2) = 2x0 + 2x1 + x2, [s](x0) = 5x0, [g](x0, x1) = x0 + x1 + 1 orientation: g(x,y) = x + y + 1 >= x = x g(x,y) = x + y + 1 >= y = y f(s(x),y,y) = 10x + 3y >= 7x + 2y = f(y,x,s(x)) problem: f(s(x),y,y) -> f(y,x,s(x)) Matrix Interpretation Processor: dim=1 interpretation: [f](x0, x1, x2) = 3x0 + x1 + 2x2, [s](x0) = x0 + 1 orientation: f(s(x),y,y) = 3x + 3y + 3 >= 3x + 3y + 2 = f(y,x,s(x)) problem: Qed