YES Problem: +(0(),y) -> y +(s(x),y) -> s(+(x,y)) -(0(),y) -> 0() -(x,0()) -> x -(s(x),s(y)) -> -(x,y) Proof: DP Processor: DPs: +#(s(x),y) -> +#(x,y) -#(s(x),s(y)) -> -#(x,y) TRS: +(0(),y) -> y +(s(x),y) -> s(+(x,y)) -(0(),y) -> 0() -(x,0()) -> x -(s(x),s(y)) -> -(x,y) TDG Processor: DPs: +#(s(x),y) -> +#(x,y) -#(s(x),s(y)) -> -#(x,y) TRS: +(0(),y) -> y +(s(x),y) -> s(+(x,y)) -(0(),y) -> 0() -(x,0()) -> x -(s(x),s(y)) -> -(x,y) graph: -#(s(x),s(y)) -> -#(x,y) -> -#(s(x),s(y)) -> -#(x,y) +#(s(x),y) -> +#(x,y) -> +#(s(x),y) -> +#(x,y) CDG Processor: DPs: +#(s(x),y) -> +#(x,y) -#(s(x),s(y)) -> -#(x,y) TRS: +(0(),y) -> y +(s(x),y) -> s(+(x,y)) -(0(),y) -> 0() -(x,0()) -> x -(s(x),s(y)) -> -(x,y) graph: Qed