YES TRS: f(x,c(y)) -> f(x,s(f(y,y))) f(s(x),y) -> f(x,s(c(y))) linear polynomial interpretations on N: f_A(x1,x2) = x2 + 1 f#_A(x1,x2) = x2 + 3 c_A(x1) = x1 + 1 c#_A(x1) = 2 s_A(x1) = 0 s#_A(x1) = x1 precedence: f > c > s