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Graphs missing a connected partition

delete2026-01-01
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PRE
AI
T
Tom, Foster *
DOI:10.1016/j.aam.2026.103044delete
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摘要

摘要

En 中文
我们证明了具有割点的图,若删除该割点后产生至少五个连通分支,则该图必须缺少某种类型的连通划分。我们还证明,当存在四个连通分支且每个分支至少有两个顶点时,这一结论同样成立。特别地,此类图的色对称函数不能是e-正的。这使我们非常接近Dahlberg、She和van Willigenburg关于所有具有度数至少为四的顶点的树的色对称函数非e-正性的猜想。我们还证明了四足蜘蛛图的色对称函数不能是e-正的。
Keyword:
Chromatic symmetric function
Connected partition
Cut vertex
e-positive
Graph partition
Stanley-Stembridge conjecture
Tree isomorphism conjecture

期刊

A
Advances in Applied Mathematics
IF:
1.3
论文数:
61
被引数:
0

机构

M
massachusetts institute of technology (mit)
学者数:
1.4K
论文数: 622
被引数: 0
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