YES TRS: f(0()) -> s(0()) f(s(0())) -> s(s(0())) f(s(0())) -> *(s(s(0())),f(0())) f(+(x,s(0()))) -> +(s(s(0())),f(x)) f(+(x,y)) -> *(f(x),f(y)) max/plus interpretations on N: f_A(x1) = max{12, 6 + x1} f#_A(x1) = max{12, 6 + x1} 0_A = 0 0#_A = 0 s_A(x1) = max{4, 1 + x1} s#_A(x1) = max{4, 1 + x1} *_A(x1,x2) = max{12, 7 + x1, x2} *#_A(x1,x2) = max{12, 7 + x1, x2} +_A(x1,x2) = max{20, 27 + x1, 20 + x2} +#_A(x1,x2) = max{20, 27 + x1, 20 + x2} precedence: + > f > s > 0 = *