Ramsey numbers of trees versus fans
Ramsey numbers of trees versus fans
复制标题
拉姆齐树木数量与球迷数量
DOI:
10.1016/j.disc.2015.01.030
复制
发表时间:
2015-06
影响因子:
0.8
通讯作者:
Yaojun Chen
中科院分区:
文献类型:
--
作者:
Yanbo Zhang;Hajo Broersma;Yaojun Chen
For two given graphs G 1 and G 2, the Ramsey number R (G 1, G 2) is the smallest integer N such that, for any graph G of order N, either G contains G 1 as a subgraph or the complement of G contains G 2 as a subgraph. Let T n be a tree of order n, S n a star of order n, and F m a fan of order 2 m+ 1, ie, m triangles sharing exactly one vertex. In this paper, we prove that R (T n, F m)= 2 n− 1 for n≥ 3 m 2− 2 m− 1, and if T n= S n, then the range can be replaced by n≥ max {m (m− 1)+ 1, 6 (m− 1)}, which is tight in some sense.
登录
查看更多内容
影响因子:
0.8
作者:
V. Chvátal;F. Harary
通讯作者:
V. Chvátal;F. Harary
DOI:
10.1016/j.disc.2004.10.024
发表时间:
2005-05
期刊:
Discret. Math.
影响因子:
--
作者:
E. Baskoro;Surahmat
通讯作者:
E. Baskoro;Surahmat
影响因子:
0.7
作者:
E. Baskoro;Surahmat;S. M. Nababan;Mirka Miller
通讯作者:
E. Baskoro;Surahmat;S. M. Nababan;Mirka Miller
DOI:
10.1112/jlms/s2-24.3.405
发表时间:
1981-12
影响因子:
1.2
作者:
S. Burr
通讯作者:
S. Burr
影响因子:
0.6
作者:
V. Chvátal;F. Harary
通讯作者:
V. Chvátal;F. Harary