YES TRS: exp(x,0()) -> s(0()) exp(x,s(y)) -> *(x,exp(x,y)) *(0(),y) -> 0() *(s(x),y) -> +(y,*(x,y)) -(0(),y) -> 0() -(x,0()) -> x -(s(x),s(y)) -> -(x,y) max/plus interpretations on N: exp_A(x1,x2) = max{2, 4 + x1, 2 + x2} exp#_A(x1,x2) = max{2, 4 + x1, 2 + x2} 0_A = 1 0#_A = 1 s_A(x1) = max{4, 3 + x1} s#_A(x1) = max{4, 3 + x1} *_A(x1,x2) = max{6, 1 + x1, x2} *#_A(x1,x2) = max{6, 1 + x1, x2} +_A(x1,x2) = max{6, x1, x2} +#_A(x1,x2) = max{6, x1, x2} -_A(x1,x2) = max{2, 1 + x1, 2 + x2} -#_A(x1,x2) = max{2, 1 + x1, 2 + x2} precedence: 0 > exp = - > s = * > +