Disjoint cycles and chorded cycles in a graph with given minimum degree
Disjoint cycles and chorded cycles in a graph with given minimum degree
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图中具有给定最小度数的不相交循环和弦循环
DOI:
10.1016/j.disc.2020.111837
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发表时间:
2020
影响因子:
0.8
通讯作者:
Yeager, Elyse
中科院分区:
文献类型:
--
作者:
Molla, Theodore;Santana, Michael;Yeager, Elyse
In 1963, Corrádi and Hajnal settled a conjecture of Erdős by showing that every graph on at least 3 r vertices with minimum degree at least 2 r contains a collection of r disjoint cycles, and in 2008, Finkel proved that every graph with at least 4 s vertices and minimum degree at least 3 s contains a collection of s disjoint chorded cycles. The same year, a generalization of this theorem was conjectured by Bialostocki, Finkel, and Gyárfás: every graph with at least 3 r+ 4 s vertices and minimum degree at least 2 r+ 3 s contains a collection of r+ s disjoint cycles, s of them chorded. This conjecture was settled and further strengthened by Chiba et al.(2010). In this paper, we characterize all graphs on at least 3 r+ 4 s vertices with minimum degree at least 2 r+ 3 s− 1 that do not contain a collection of r+ s disjoint cycles, s of them chorded. In addition, we provide a conjecture regarding the minimum degree threshold for the existence of r+ s disjoint cycles, s of them chorded, and we prove an approximate version of this conjecture.
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DOI:
10.1016/j.jctb.2016.05.007
发表时间:
2016-01
期刊:
J. Comb. Theory B
影响因子:
--
作者:
H. Kierstead;A. Kostochka;E. Yeager
通讯作者:
H. Kierstead;A. Kostochka;E. Yeager
影响因子:
0.7
作者:
S. Chiba;S. Fujita;Yunshu Gao;Guojun Li
通讯作者:
S. Chiba;S. Fujita;Yunshu Gao;Guojun Li
影响因子:
0.9
作者:
K. Kawarabayashi
通讯作者:
K. Kawarabayashi
影响因子:
1
作者:
A. Shokoufandeh;Yi Zhao
通讯作者:
Yi Zhao