Towards the linear arboricity conjecture
Towards the linear arboricity conjecture
复制标题
走向线性树木性猜想
DOI:
10.1016/j.jctb.2019.08.009
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Jain, Vishesh
中科院分区:
文献类型:
--
作者:
Ferber, Asaf;Fox, Jacob;Jain, Vishesh
The linear arboricity of a graph G, denoted by la (G), is the minimum number of edge-disjoint linear forests (ie forests in which every connected component is a path) in G whose union covers all the edges of G. A famous conjecture due to Akiyama, Exoo, and Harary from 1981 asserts that la (G)≤⌈(Δ (G)+ 1)/2⌉, where Δ (G) denotes the maximum degree of G. This conjectured upper bound would be best possible, as is easily seen by taking G to be a regular graph. In this paper, we show that for every graph G, la (G)≤ Δ 2+ O (Δ 2/3− α) for some α> 0, thereby improving the previously best known bound due to Alon and Spencer from 1992. For graphs which are sufficiently good spectral expanders, we give even better bounds. Our proofs of these results further give probabilistic polynomial time algorithms for finding such decompositions into linear forests.
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DOI:
--
发表时间:
2018
期刊:
IEEE Annual Symposium on Foundations of Computer Science
影响因子:
--
作者:
Asaf Ferber;Vishesh Jain
通讯作者:
Vishesh Jain
DOI:
--
发表时间:
2015
期刊:
Electron. Notes Discret. Math.
影响因子:
--
作者:
Stefan Glock;D. Kühn;D. Osthus
通讯作者:
D. Osthus
DOI:
--
发表时间:
1998
期刊:
Combinatorics, probability & computing
影响因子:
--
作者:
David A. Grable
通讯作者:
David A. Grable
DOI:
--
发表时间:
1968
期刊:
影响因子:
--
作者:
L. Mirsky
通讯作者:
L. Mirsky
影响因子:
0.8
作者:
R. Anstee
通讯作者:
R. Anstee