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) linear polynomial interpretations on N: exp_A(x1,x2) = x1 + 2 exp#_A(x1,x2) = x1 + x2 + 3 0_A = 1 0#_A = 0 s_A(x1) = x1 + 1 s#_A(x1) = 0 *_A(x1,x2) = 1 *#_A(x1,x2) = x2 + 1 +_A(x1,x2) = 0 +#_A(x1,x2) = 0 -_A(x1,x2) = x1 -#_A(x1,x2) = 1 precedence: exp > 0 = s > * = + = -