All Quadrilateral-Wheel Planar Ramsey Numbers

All Quadrilateral-Wheel Planar Ramsey Numbers
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DOI:
10.1007/s00373-017-1759-6
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发表时间:
2017-03
影响因子:
0.7
通讯作者:
Yaojun Chen;Z. Miao;Guofei Zhou
Yaojun Chen;Z. Miao;Guofei Zhou
中科院分区:
数学4区
文献类型:
--
作者:
Yaojun Chen;Z. Miao;Guofei Zhou

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对于两个给定的图,平面Ramsey数表示最小整数,使得每个平面图Gonn个顶点或者包含一个拷贝,或者它的补图包含一个拷贝。用字母表示一个长度的循环和一个次序的轮.四边形是a。一个图称为-自由的,如果它没有和表示n阶全自由平面图的最小度的最大值。在本文中,我们首先证明了,如果,如果,和otherwise。在此基础上,证明了,whereif,if,and,otherwise.
For two given graphsand, the planar Ramsey numberis the smallest integernsuch that every planar graphGonnvertices either contains a copy of, or its complement contains a copy of. Letdenote a cycle of lengthlanda wheel of order. A quadrilateral is a. A graph is called-free if it has noanddenotes the maximum values of the minimum degrees in all-free planar graphs of ordern. In this paper, we first show thatif,ifand, andotherwise. Based on this result, it is shown that, whereif,ifand, andotherwise.