YES Problem: 0(*(x1)) -> *(1(x1)) 1(*(x1)) -> 0(#(x1)) #(0(x1)) -> 0(#(x1)) #(1(x1)) -> 1(#(x1)) #($(x1)) -> *($(x1)) #(#(x1)) -> #(x1) #(*(x1)) -> *(x1) Proof: KBO Processor: weight function: w0 = 1 w(#) = w(1) = w(0) = w(*) = 1 w($) = 0 precedence: $ > # > 1 > 0 > * problem: Qed