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