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TAMC
2009
Springer
14 years 6 months ago
Linear Programming Based Approximation Algorithms for Feedback Set Problems in Bipartite Tournaments
We consider the feedback vertex set and feedback arc set problems in bipartite tournaments. We improve on recent results by giving a 2-approximation algorithm for the feedback vert...
Anke van Zuylen
FSTTCS
2009
Springer
14 years 6 months ago
Kernels for Feedback Arc Set In Tournaments
A tournament T = (V, A) is a directed graph in which there is exactly one arc between every pair of distinct vertices. Given a digraph on n vertices and an integer parameter k, th...
Stéphane Bessy, Fedor V. Fomin, Serge Gaspe...
AAIM
2009
Springer
137views Algorithms» more  AAIM 2009»
14 years 6 months ago
On Approximating an Implicit Cover Problem in Biology
Abstract. In an implicit combinatorial optimization problem, the constraints are not enumerated explicitly but rather stated implicitly through equations, other constraints or auxi...
Mary V. Ashley, Tanya Y. Berger-Wolf, Wanpracha Ar...