YES ---- CR(R) ---- R : left-linear, C : CR and CP-closing, and Cdup/R : SN R: -(0(),0()) -> 0() -(s(x),0()) -> s(x) -(x,s(y)) -> -(d(x),y) d(s(x)) -> x -(s(x),s(y)) -> -(x,y) -(d(x),y) -> -(x,s(y)) CP(R): -(d(s(___y1189)),___y1188) -> -(___y1189,___y1188) -(d(d(___y1193)),___y1192) -> -(___y1193,s(s(___y1192))) -(___y1206,___y1208) -> -(s(___y1206),s(___y1208)) -(___y1214,___y1215) -> -(d(s(___y1214)),___y1215) -(___y1234,s(s(___y1237))) -> -(d(d(___y1234)),___y1237) critical-pair-closing system C: -(x,s(y)) -> -(d(x),y) d(s(x)) -> x CR(C): see below. ---- CR(R) ---- R : left-linear, C : CR and CP-closing, and Cdup/R : SN R: -(x,s(y)) -> -(d(x),y) d(s(x)) -> x CP(R): critical-pair-closing system C: CR(C): see below. ---- CR(R) ---- R is empty.