构造4个一般阶循环图,得到4个经典Ramsey数R(3,g)的新下界:R(3,24)≥141,R(3,25)≥146,R(3,26)≥151,R(3,27)≥159.
Four circulant graphs of general order are constructed, so four new lower bounds of classical Ramsey numbers R (3, q) are obtained as R (3,24)≥141, R ( 3,25 )≥146, R (3,26) 151,R (3,27)≥159.