YES TRS: .(1(),x) -> x .(x,1()) -> x .(i(x),x) -> 1() .(x,i(x)) -> 1() i(1()) -> 1() i(i(x)) -> x .(i(y),.(y,z)) -> z .(y,.(i(y),z)) -> z .(.(x,y),z) -> .(x,.(y,z)) i(.(x,y)) -> .(i(y),i(x)) linear polynomial interpretations on N: ._A(x1,x2) = x1 + x2 + 1 .#_A(x1,x2) = x1 1_A = 1 1#_A = 1 i_A(x1) = x1 i#_A(x1) = x1 + 2 precedence: . > i > 1