构造两个素数阶循环图,并引用相关的公式,得到八个Ramsey数的新下界:R(3,24)140,R(3,28)≥164,R(3,93)≥835,R(3,109)≥979,R(5,25)≥557,R(5,29)≥653,R(3,3,25)≥557,R(3,3,29)653。
Two circulant graphs of prime number order are constructed and some related formulas are used, so eight new lower bounds of Ramsey numbers are obtained : R ( 3,24 )≥140, R ( 3,28 )≥164, R ( 3,93 )≥835, R ( 3,109 )≥979, R ( 5, 25)≥557,R(5,29)≥653 ,R(3,3,25)≥557,R(3,3,29)≥653.