Large-Girth Roots of Graphs
Large-Girth Roots of Graphs
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图的大周根
DOI:
10.1137/100792949
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发表时间:
2010
影响因子:
0.8
通讯作者:
Adamaszek A
中科院分区:
文献类型:
--
作者:
Adamaszek A
We study the problem of recognizing graph powers and computing roots of graphs. Our focus is on classes of graphs with no short cycles. We provide a polynomial time recognition algorithm forr-th powers of graphs of girth at least, thus improving a recently conjectured bound. Our algorithm also finds allr-th roots of a given graph that have girth at leastand no degree one vertices, which is a step toward a recent conjecture of Levenshtein [Discrete Math., 308 (2008), pp. 993–998] that such roots should be unique. Similar algorithms have so far been designed only for. On the negative side, we prove that recognition of graph powers becomes an NP-complete problem when the bound on girth is about twice smaller. (Anna Adamaszek's correct affiliation is Department of Computer Science and Centre for Discrete Mathematics and Its Applications (DIMAP), University of Warwick, Coventry, CV4 7AL, UK.)
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DOI:
10.1016/j.disc.2007.09.027
发表时间:
2008
期刊:
Discret. Math.
影响因子:
--
作者:
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通讯作者:
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DOI:
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发表时间:
1991
期刊:
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影响因子:
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影响因子:
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通讯作者:
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影响因子:
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DOI:
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发表时间:
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期刊:
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影响因子:
--
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通讯作者:
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