把素数阶循环图的某些性质移植到一般阶循环图,改进团数的计算方法,获得3个经典Ramsey数R(3,t)的新下界:R(3,36)≥238,R(3,37)≥243,R(3,38)≥255。
Some properties of cyclicgraphs of prime order are generalized to cyclic graphs.The methods of computing clique numbers are improved.New lower bounds for three Ramsey numbers are got:R(3,36)≥238,R(3,37)≥243,R(3,38)≥255.