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» Algorithms for finding clique-transversals of graphs
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FCT
2005
Springer
14 years 2 months ago
On Finding Acyclic Subhypergraphs
: In this paper, we investigate the problem to find an acyclic subhypergraph in a given hypergraph, which is an extension to find a tree in a graph. First, we introduce a spannin...
Kouichi Hirata, Megumi Kuwabara, Masateru Harao
CORR
2008
Springer
133views Education» more  CORR 2008»
13 years 8 months ago
A simple local 3-approximation algorithm for vertex cover
We present a local algorithm (constant-time distributed algorithm) for finding a 3-approximate vertex cover in bounded-degree graphs. The algorithm is deterministic, and no auxili...
Valentin Polishchuk, Jukka Suomela
ESA
2010
Springer
188views Algorithms» more  ESA 2010»
13 years 6 months ago
Contractions of Planar Graphs in Polynomial Time
Abstract. We prove that for every graph H, there exists a polynomial-time algorithm deciding if a planar graph can be contracted to H. We introduce contractions and topological min...
Marcin Kaminski, Daniël Paulusma, Dimitrios M...
EOR
2008
136views more  EOR 2008»
13 years 8 months ago
Complexity and exact algorithms for vertex multicut in interval and bounded treewidth graphs
Multicut is a fundamental network communication and connectivity problem. It is defined as: given an undirected graph and a collection of pairs of terminal vertices, find a minimu...
Jiong Guo, Falk Hüffner, Erhan Kenar, Rolf Ni...
WALCOM
2008
IEEE
82views Algorithms» more  WALCOM 2008»
13 years 10 months ago
Exact Algorithms for Maximum Acyclic Subgraph on a Superclass of Cubic Graphs
Abstract. Finding a maximum acyclic subgraph is on the list of problems that seem to be hard to tackle from a parameterized perspective. We develop two quite efficient algorithms (...
Henning Fernau, Daniel Raible