DAGSTUHL
2007
14 years 27 days ago
2007
To decide if the parameterized feedback vertex set problem in directed graph is fixed-parameter tractable is a long standing open problem. In this paper, we prove that the paramet...
CIAC
2006
Springer
14 years 3 months ago
2006
Springer
Complementing recent progress on classical complexity and polynomial-time approximability of feedback set problems in (bipartite) tournaments, we extend and partially improve fixed...
SWAT
2010
Springer
14 years 4 months ago
2010
Springer
This paper presents an O(n2 ) algorithm for deciding isomorphism of graphs that have bounded feedback vertex set number. This number is defined as the minimum number of vertex de...
WADS
2005
Springer
14 years 4 months ago
2005
Springer
Abstract. Settling a ten years open question, we show that the NPcomplete Feedback Vertex Set problem is deterministically solvable in O(ck ·m) time, where m denotes the number of...
ISAAC
2005
Springer
14 years 5 months ago
2005
Springer
Let G be a graph with a nonnegative integral function w defined on V (G). A collection F of subsets of V (G) (repetition is allowed) is called a feedback vertex set packing in G ...
ICTCS
2005
Springer
14 years 5 months ago
2005
Springer
Abstract. We study efficient exact algorithms for several problems including Vertex Bipartization, Feedback Vertex Set, 3-Hitting Set, Max Cut in graphs with maximum degree at most...
ICALP
2005
Springer
14 years 5 months ago
2005
Springer
In this paper we initiate the study of the AND-OR directed feedback vertex set problem from the viewpoint of approximation algorithms. This AND-OR feedback vertex set problem is m...
WADS
2007
Springer
14 years 5 months ago
2007
Springer
Abstract. We present improved parameterized algorithms for the Feedback Vertex Set problem on both unweighted and weighted graphs. Both algorithms run in time O(5k kn2 ). The algor...
STACS
2007
Springer
14 years 5 months ago
2007
Springer
In this paper, it is shown that the Feedback Vertex Set problem on unweighted, undirected graphs has a kernel of cubic size. I.e., a polynomial time algorithm is described, that, w...
TAMC
2009
Springer
2009
Springer
Linear Programming Based Approximation Algorithms for Feedback Set Problems in Bipartite Tournaments
14 years 6 months ago
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...