Pure Pairs. V. Excluding Some Long Subdivision
Pure Pairs. V. Excluding Some Long Subdivision
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纯对。
DOI:
10.1007/s00493-023-00025-8
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发表时间:
2023
期刊:
影响因子:
1.1
通讯作者:
Spirkl, Sophie
中科院分区:
文献类型:
--
作者:
Scott, Alex;Seymour, Paul;Spirkl, Sophie
A “pure pair” in a graphGis a pairA,Bof disjoint subsets ofV(G) such thatAis complete or anticomplete toB. Jacob Fox showed that for all, there is a comparability graphGwithnvertices, wherenis large, in which there is no pure pairA,Bwith. He also proved that for allthere existssuch that for every comparability graphGwithvertices, there is a pure pairA,Bwith; and conjectured that the same holds for every perfect graphG. We prove this conjecture and strengthen it in several ways. In particular, we show that for all, and all, there existssuch that, ifGis an-vertex graph with no hole of length exactlyand no antihole of length exactly, then there is a pure pairA,BinGwithand. This is further strengthened, replacing excluding a hole by excluding some “long” subdivision of a general graph.
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DOI:
--
发表时间:
2022
期刊:
影响因子:
--
作者:
A. Scott;P. Seymour;S. Spirkl;M. Chudnovsky
通讯作者:
M. Chudnovsky
影响因子:
0.8
作者:
V. Rödl
通讯作者:
V. Rödl
DOI:
--
发表时间:
2019
期刊:
Journal of combinatorial theory. Series B (Print)
影响因子:
--
作者:
Anita Liebenau;Marcin Pilipczuk;P. Seymour;S. Spirkl
通讯作者:
S. Spirkl
DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
M. Chudnovsky;A. Scott;P. Seymour;S. Spirkl
通讯作者:
S. Spirkl
DOI:
--
发表时间:
2007
期刊:
Electron. Notes Discret. Math.
影响因子:
--
作者:
J. Fox;B. Sudakov
通讯作者:
B. Sudakov