Ramsey数R(4,q)的3个下界

Lower Bounds of Three Ramsey Numbers R(4,q)

构造了３个新的素数阶循环图，从而得到了３个Ｒａｍｓｅｙ数的下界：Ｒ（４，２０）≥２００，Ｒ（４，２１）≥２２４，Ｒ（４，２２）≥２５２．

Three new prime order cyclic graph were structured, so three lower bounds of Ramsey numbers were obtained: R(4,20)≥200, R(4,21)≥224, R(4, 22)≥252.