Solving the canonical representation and Star System Problems for proper circular-arc graphs in logspace
Solving the canonical representation and Star System Problems for proper circular-arc graphs in logspace
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解决对数空间中适当圆弧图的规范表示和星系统问题
DOI:
10.1016/j.jda.2016.03.001
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
O. Verbitsky
中科院分区:
文献类型:
--
作者:
J. Köbler;S. Kuhnert;O. Verbitsky
We present a logspace algorithm that constructs a canonical intersection model for a given proper circular-arc graph, wherecanonicalmeans that isomorphic graphs receive identical models. This implies that the recognition and the isomorphism problems for these graphs are solvable in logspace. For the broader class of concave-round graphs, which still possess (not necessarily proper) circular-arc models, we show that a canonical circular-arc model can also be constructed in logspace. As a building block for these results, we design a logspace algorithm for computing canonical circular-arc models of circular-arc hypergraphs. This class of hypergraphs corresponds to matrices with thecircular ones property, which play an important role in computational genomics. Our results imply that there is a logspace algorithm that decides whether a given matrix has this property.Furthermore, we consider the Star System Problem that consists in reconstructing a graph from its closed neighborhood hypergraph. We show that this problem is solvable in logarithmic space for the classes of proper circular-arc, concave-round, and co-convex graphs.Note that solving a problem in logspace implies that it is solvable by a parallel algorithm of the class AC1. For the problems under consideration, at most AC2algorithms were known earlier.
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DOI:
10.1016/0012-365x(81)90271-5
发表时间:
1981
期刊:
Discret. Math.
影响因子:
--
作者:
Francoise Lalonde
通讯作者:
Francoise Lalonde
影响因子:
0.9
作者:
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通讯作者:
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2014
期刊:
arXiv.org
影响因子:
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Francisco J. Soulignac
通讯作者:
Francisco J. Soulignac
影响因子:
0.8
作者:
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通讯作者:
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DOI:
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发表时间:
1984
期刊:
J. ACM
影响因子:
--
作者:
J. Reif
通讯作者:
J. Reif