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