Two Circulant Graphs of Prime Order and New Lower Bounds of Eight Classical Ramsey Numbers
两个素数阶循环图与八个经典Ramsey数的下界*

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。