A bandwidth theorem for approximate decompositions
A bandwidth theorem for approximate decompositions
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近似分解的带宽定理
DOI:
10.1112/plms.12218
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发表时间:
2018
影响因子:
1.8
通讯作者:
Condon P
中科院分区:
文献类型:
--
作者:
Condon P
We provide a degree condition on a regular‐vertex graphwhich ensures the existence of a near optimal packing of any familyof bounded degree‐vertex‐chromatic separable graphs into. In general, this degree condition is best possible.Here a graph is separable if it has a sublinear separator whose removal results in a set of components of sublinear size. Equivalently, the separability condition can be replaced by that of having small bandwidth. Thus our result can be viewed as a version of the bandwidth theorem of Böttcher, Schacht and Taraz in the setting of approximate decompositions.More precisely, letbe the infimum over allensuring an approximate‐decomposition of any sufficiently large regular‐vertex graphof degree at least. Now suppose thatis an‐vertex graph which is close to‐regular for someand suppose thatis a sequence of bounded degree‐vertex‐chromatic separable graphs with. We show that there is an edge‐disjoint packing ofinto.If theare bipartite, thenis sufficient. In particular, this yields an approximate version of the tree packing conjecture in the setting of regular host graphsof high degree. Similarly, our result implies approximate versions of the Oberwolfach problem, the Alspach problem and the existence of resolvable designs in the setting of regular host graphs of high degree.
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影响因子:
1.7
作者:
Allen P
通讯作者:
Allen P
DOI:
--
发表时间:
2009
期刊:
J. Comb. Theory B
影响因子:
--
作者:
D. Bryant;Victor Scharaschkin
通讯作者:
Victor Scharaschkin
DOI:
--
发表时间:
2017
期刊:
Random Struct. Algorithms
影响因子:
--
作者:
R. Montgomery
通讯作者:
R. Montgomery
DOI:
--
发表时间:
2007
期刊:
Canadian mathematical bulletin
影响因子:
--
作者:
P. Dukes;A. Ling
通讯作者:
A. Ling
DOI:
--
发表时间:
2008
期刊:
Comb.
影响因子:
--
作者:
Hemanshu Kaul;A. Kostochka;Gexin Yu
通讯作者:
Gexin Yu