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SODA
2003
ACM
133views Algorithms» more  SODA 2003»
13 years 10 months ago
Integrality ratio for group Steiner trees and directed steiner trees
The natural relaxation for the Group Steiner Tree problem, as well as for its generalization, the Directed Steiner Tree problem, is a flow-based linear programming relaxation. We...
Eran Halperin, Guy Kortsarz, Robert Krauthgamer, A...
CC
2008
Springer
133views System Software» more  CC 2008»
13 years 9 months ago
Hardness Amplification via Space-Efficient Direct Products
We prove a version of the derandomized Direct Product lemma for deterministic space-bounded algorithms. Suppose a Boolean function g : {0, 1}n {0, 1} cannot be computed on more th...
Venkatesan Guruswami, Valentine Kabanets
ATAL
2009
Springer
14 years 3 months ago
Directed soft arc consistency in pseudo trees
We propose an efficient method that applies directed soft arc consistency to a Distributed Constraint Optimization Problem (DCOP) which is a fundamental framework of multi-agent ...
Toshihiro Matsui, Marius-Calin Silaghi, Katsutoshi...
P2P
2009
IEEE
122views Communications» more  P2P 2009»
14 years 4 months ago
Virtual Direction Routing for Overlay Networks
The enormous interest for peer-to-peer systems in recent years has prompted research into finding scalable and robust seeding and searching methods to support these overlay netwo...
Bow-Nan Cheng, Murat Yuksel, Shivkumar Kalyanarama...
CORR
2008
Springer
139views Education» more  CORR 2008»
13 years 9 months ago
Exact two-terminal reliability of some directed networks
Abstract-- The calculation of network reliability in a probabilistic context has long been an issue of practical and academic importance. Conventional approaches (determination of ...
Christian Tanguy