19 search results - page 2 / 4 » Computing Minimum Directed Feedback Vertex Set in O(1.9977n) |
SIROCCO
2001
13 years 6 months ago
2001
Given a set S of elements in a directed network that are initially faulty, an element becomes (functionally) faulty if all its in-neighbors or all its outneighbors are (functional...
ICALP
2005
Springer
13 years 10 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...
CORR
2011
Springer
12 years 8 months ago
2011
Springer
A hitting set for a collection of sets is a set that has a nonempty intersection with each set in the collection; the hitting set problem is to find a hitting set of minimum card...
FSTTCS
2009
Springer
13 years 12 months ago
2009
Springer
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...
IWPEC
2009
Springer
13 years 12 months ago
2009
Springer
In this paper we initiate a systematic study of the Reduced Degree Spanning Tree problem, where given a digraph D and a nonnegative integer k, the goal is to construct a spanning o...