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