YES TRS: g(f(x,y),z) -> f(x,g(y,z)) g(h(x,y),z) -> g(x,f(y,z)) g(x,h(y,z)) -> h(g(x,y),z) max/plus interpretations on N: g_A(x1,x2) = max{0, x1, x2} g#_A(x1,x2) = max{0, x1, x2} f_A(x1,x2) = max{0, x1, x2} f#_A(x1,x2) = max{0, x1, x2} h_A(x1,x2) = max{0, x1, x2} h#_A(x1,x2) = max{0, x1, x2} precedence: g = f > h