YES Problem: strict: l(m(x)) -> m(l(x)) m(r(x)) -> r(m(x)) f(m(x),y) -> f(x,m(y)) weak: b() -> l(b()) f(x,y) -> f(x,r(y)) Proof: Matrix Interpretation Processor: dim=2 interpretation: [0] [b] = [3], [1 0] [l](x0) = [1 1]x0, [1 1] [2 0] [2] [f](x0, x1) = [2 0]x0 + [0 0]x1 + [0], [1 0] [0] [m](x0) = [2 1]x0 + [1], [1 0] [0] [r](x0) = [0 0]x0 + [1] orientation: [1 0] [0] [1 0] [0] l(m(x)) = [3 1]x + [1] >= [3 1]x + [1] = m(l(x)) [1 0] [0] [1 0] [0] m(r(x)) = [2 0]x + [2] >= [0 0]x + [1] = r(m(x)) [3 1] [2 0] [3] [1 1] [2 0] [2] f(m(x),y) = [2 0]x + [0 0]y + [0] >= [2 0]x + [0 0]y + [0] = f(x,m(y)) [0] [0] b() = [3] >= [3] = l(b()) [1 1] [2 0] [2] [1 1] [2 0] [2] f(x,y) = [2 0]x + [0 0]y + [0] >= [2 0]x + [0 0]y + [0] = f(x,r(y)) problem: strict: l(m(x)) -> m(l(x)) m(r(x)) -> r(m(x)) weak: b() -> l(b()) f(x,y) -> f(x,r(y)) Matrix Interpretation Processor: dim=2 interpretation: [0] [b] = [0], [2 0] [l](x0) = [0 0]x0, [1 0] [2 0] [f](x0, x1) = [0 0]x0 + [1 0]x1, [1 1] [m](x0) = [0 1]x0, [0] [r](x0) = x0 + [2] orientation: [2 2] [2 0] l(m(x)) = [0 0]x >= [0 0]x = m(l(x)) [1 1] [2] [1 1] [0] m(r(x)) = [0 1]x + [2] >= [0 1]x + [2] = r(m(x)) [0] [0] b() = [0] >= [0] = l(b()) [1 0] [2 0] [1 0] [2 0] f(x,y) = [0 0]x + [1 0]y >= [0 0]x + [1 0]y = f(x,r(y)) problem: strict: l(m(x)) -> m(l(x)) weak: b() -> l(b()) f(x,y) -> f(x,r(y)) Matrix Interpretation Processor: dim=5 interpretation: [0] [0] [b] = [0] [0] [0], [1 1 0 0 0] [0 1 0 0 0] [l](x0) = [0 0 0 0 0]x0 [0 1 0 0 0] [0 0 0 0 0] , [1 0 0 0 0] [1 1 1 1 1] [0 0 0 0 0] [1 1 0 0 0] [f](x0, x1) = [0 0 0 0 0]x0 + [0 0 0 0 0]x1 [0 0 0 0 0] [0 0 0 0 0] [0 0 0 0 0] [1 1 1 1 0] , [1 0 0 0 0] [0] [0 1 0 0 0] [1] [m](x0) = [0 0 0 0 0]x0 + [0] [0 0 0 0 0] [0] [0 0 0 0 0] [0], [1 1 0 0 0] [0 0 0 0 0] [r](x0) = [0 0 0 0 0]x0 [0 0 1 1 0] [0 0 0 0 0] orientation: [1 1 0 0 0] [1] [1 1 0 0 0] [0] [0 1 0 0 0] [1] [0 1 0 0 0] [1] l(m(x)) = [0 0 0 0 0]x + [0] >= [0 0 0 0 0]x + [0] = m(l(x)) [0 1 0 0 0] [1] [0 0 0 0 0] [0] [0 0 0 0 0] [0] [0 0 0 0 0] [0] [0] [0] [0] [0] b() = [0] >= [0] = l(b()) [0] [0] [0] [0] [1 0 0 0 0] [1 1 1 1 1] [1 0 0 0 0] [1 1 1 1 0] [0 0 0 0 0] [1 1 0 0 0] [0 0 0 0 0] [1 1 0 0 0] f(x,y) = [0 0 0 0 0]x + [0 0 0 0 0]y >= [0 0 0 0 0]x + [0 0 0 0 0]y = f(x,r(y)) [0 0 0 0 0] [0 0 0 0 0] [0 0 0 0 0] [0 0 0 0 0] [0 0 0 0 0] [1 1 1 1 0] [0 0 0 0 0] [1 1 1 1 0] problem: strict: weak: b() -> l(b()) f(x,y) -> f(x,r(y)) Qed