YES TRS: f(c(s(x),y)) -> f(c(x,s(y))) g(c(x,s(y))) -> g(c(s(x),y)) linear polynomial interpretations on N: f_A(x1) = 0 f#_A(x1) = 2 c_A(x1,x2) = x2 + 1 c#_A(x1,x2) = 1 s_A(x1) = x1 + 1 s#_A(x1) = 0 g_A(x1) = x1 g#_A(x1) = x1 + 1 precedence: f > c > g > s