YES Problem: f(g(x),h(x,y)) -> a() g(b()) -> c() h(x,d()) -> e() Proof: Matrix Interpretation Processor: dimension: 3 interpretation: [0] [e] = [0] [0], [0] [d] = [0] [0], [0] [c] = [0] [0], [0] [b] = [0] [1], [0] [a] = [0] [0], [1 0 0] [1 0 0] [f](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 1] [g](x0) = [0 0 0]x0 [0 0 0] orientation: [2 0 1] [1 0 0] [1] [0] f(g(x),h(x,y)) = [0 0 0]x + [0 0 0]y + [0] >= [0] = a() [0 0 0] [0 0 0] [0] [0] [1] [0] g(b()) = [0] >= [0] = c() [0] [0] [1 0 0] [1] [0] h(x,d()) = [0 0 0]x + [0] >= [0] = e() [0 0 0] [0] [0] problem: Qed