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» On Directed Triangles in Digraphs
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IWPEC
2009
Springer
14 years 1 months ago
On the Directed Degree-Preserving Spanning Tree Problem
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...
Daniel Lokshtanov, Venkatesh Raman, Saket Saurabh,...
DISOPT
2011
240views Education» more  DISOPT 2011»
13 years 2 months ago
On the directed Full Degree Spanning Tree problem
We study the parameterized complexity of a directed analog of the Full Degree Spanning Tree problem where, given a digraph D and a nonnegative integer k, the goal is to construct a...
Daniel Lokshtanov, Venkatesh Raman, Saket Saurabh,...
CORR
2008
Springer
91views Education» more  CORR 2008»
13 years 7 months ago
Digraph Decompositions and Monotonicity in Digraph Searching
Abstract. We consider graph searching games on directed graphs and corresponding digraph decompositions. In particular we show that two important variants of these games
Stephan Kreutzer, Sebastian Ordyniak
DM
1998
57views more  DM 1998»
13 years 7 months ago
Note on alternating directed cycles
The problem of the existence of an alternating simple dicycle in a 2-arc-coloured digraph is considered. This is a generalization of the alternating cycle problem in 2-edgecoloure...
Gregory Gutin, Benny Sudakov, Anders Yeo
JCT
2011
86views more  JCT 2011»
13 years 2 months ago
Descendant-homogeneous digraphs
The descendant set desc(α) of a vertex α in a digraph D is the set of vertices which can be reached by a directed path from α. A subdigraph of D is finitely generated if it is...
Daniela Amato, John K. Truss