Polynomial bounds for chromatic number. III. Excluding a double star
Polynomial bounds for chromatic number. III. Excluding a double star
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色数的多项式界限。
DOI:
10.1002/jgt.22862
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发表时间:
2022
影响因子:
0.9
通讯作者:
Spirkl, Sophie
中科院分区:
文献类型:
--
作者:
Scott, Alex;Seymour, Paul;Spirkl, Sophie
A “double star” is a tree with two internal vertices. It is known that the Gyárfás–Sumner conjecture holds for double stars, that is, for every double star H $H$, there is a function f H ${f}_{H}$ such that if G $G$ does not contain H $H$ as an induced subgraph then χ ( G ) ≤ f H ( ω ( G ) ) $\chi (G)\le {f}_{H}(\omega (G))$ (where χ , ω $\chi ,\omega $ are the chromatic number and the clique number of G $G$). Here we prove that f H ${f}_{H}$ can be chosen to be a polynomial.
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DOI:
10.1016/0012-365x(80)90230-7
发表时间:
1980
期刊:
Discret. Math.
影响因子:
--
作者:
A. Gyárfás;E. Szemerédi;Z. Tuza
通讯作者:
A. Gyárfás;E. Szemerédi;Z. Tuza
影响因子:
0.9
作者:
Scott, Alex;Seymour, Paul;Spirkl, Sophie
通讯作者:
Spirkl, Sophie
DOI:
10.1002/jgt.3190180203
发表时间:
1994-03
期刊:
J. Graph Theory
影响因子:
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作者:
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通讯作者:
H. Kierstead;S. Penrice
DOI:
10.1137/s0895480198339869
发表时间:
2004-04
期刊:
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影响因子:
--
作者:
H. Kierstead;Yingxian Zhu
通讯作者:
H. Kierstead;Yingxian Zhu
DOI:
10.1016/j.ejc.2019.103024
发表时间:
2018-07
期刊:
Eur. J. Comb.
影响因子:
--
作者:
A. Scott;P. Seymour
通讯作者:
A. Scott;P. Seymour