On the number of spanning trees of some irregular line graphs
On the number of spanning trees of some irregular line graphs
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关于一些不规则线图的生成树数
DOI:
10.1016/j.jcta.2013.06.005
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发表时间:
2013-09
期刊:
影响因子:
--
通讯作者:
Weigen Yan
中科院分区:
文献类型:
--
作者:
Weigen Yan
Let G be a graph with n vertices and m edges and Δ and δ the maximum degree and minimum degree of G. Suppose G′ is the graph obtained from G by attaching Δ− d G (v) pendent edges to each vertex v of G. It is well known that if G is regular (ie, Δ= δ, G= G′), then the line graph of G, denoted by L (G), has 2 m− n+ 1 Δ m− n− 1 t (G) spanning trees, where t (G) is the number of spanning trees of G. In this paper, we prove that if G is irregular (ie, Δ≠ δ), then t (L (G′))= 2 m− n+ 1 Δ m+ s− n− 1 t (G), where s is the number of vertices of degree one in G′.
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DOI:
10.1057/jors.1977.45
发表时间:
1978-03
期刊:
--
影响因子:
--
作者:
E. Lloyd;J. Bondy;U. Murty
通讯作者:
E. Lloyd;J. Bondy;U. Murty
影响因子:
1.1
作者:
Yan, Weigen;Zhang, Fuji
通讯作者:
Zhang, Fuji
影响因子:
1.3
作者:
Fuji Zhang;Yi-Chiuan Chen;Zhibo Chen
通讯作者:
Fuji Zhang;Yi-Chiuan Chen;Zhibo Chen
影响因子:
1.1
作者:
Zhang, Fuji;Yan, Weigen
通讯作者:
Yan, Weigen
DOI:
10.1017/cbo9780511608704
发表时间:
1974
期刊:
--
影响因子:
--
作者:
N. Biggs
通讯作者:
N. Biggs