The vertex-isoperimetric number of the incidence and non-incidence graphs of unitals
The vertex-isoperimetric number of the incidence and non-incidence graphs of unitals
复制标题
单位发生图和非发生图的顶点等周数
DOI:
10.1007/s10623-018-0498-x
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发表时间:
2017-12
期刊:
影响因子:
--
通讯作者:
Zhou Sanming
中科院分区:
文献类型:
--
作者:
Hui Alice M. W.;Surani Muhammad Adib;Zhou Sanming
We derive upper and lower bounds for the vertex-isoperimetric number of the incidence graphs of unitals and determine its order of magnitude. In the case when a unital contains sufficiently large arcs, these bounds agree and give rise to the precise value of this parameter. In particular, we obtain the exact value of the vertex-isoperimetric number of the incidence graphs of classical unitals and a certain subfamily of BM-unitals. In the case when the maximum size of arcs in the unital is relatively small, we obtain an upper bound for this parameter in terms of the vertex-isoperimetric number of the incidence graph. We also determine the exact value of the vertex-isoperimetric number of the non-incidence graph of any unital.
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DOI:
10.1007/978-0-387-76366-8
发表时间:
2008-08
期刊:
--
影响因子:
--
作者:
G. Ebert;S. G. Barwick
通讯作者:
G. Ebert;S. G. Barwick
DOI:
10.1017/cbo9781139207249.009
发表时间:
2012
期刊:
--
影响因子:
--
作者:
W. Marsden
通讯作者:
W. Marsden
DOI:
10.1016/j.jctb.2008.02.007
发表时间:
2008-11
期刊:
J. Comb. Theory, Ser. B
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1017/cbo9780511616679
发表时间:
2004-02
期刊:
--
影响因子:
--
作者:
L. H. Harper
通讯作者:
L. H. Harper
影响因子:
0.9
作者:
Michael E. O'Nak
通讯作者:
Michael E. O'Nak