4个经典 Ramsey 数 R(5,q)的下界

Lower Bounds of Four Classical Ramsey Numbers R (5, q )

本文构造了４个新的素数阶循环图，从而得到了４个Ｒａｍｓｅｙ数的下界：Ｒ（５，１６）≥２３４，Ｒ（５，１９）≥３１４，Ｒ（５，２０）≥３３２，Ｒ（５，２２）≥３８０。

Four prime order cyclic graph are structured,so iowerbounds of four Ramsey numbers is obtained: R (5,16)≥234, R (5,19)≥314, R (5,20)≥332, R (5,22)≥380.