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STOC
2006
ACM
113views Algorithms» more  STOC 2006»
16 years 22 days ago
Logarithmic hardness of the directed congestion minimization problem
We show that for any constant ε > 0, there is no Ω(log1−ε M)approximation algorithm for the directed congestion minimization problem on networks of size M unless NP ⊆ Z...
Matthew Andrews, Lisa Zhang
ICMCS
2005
IEEE
71views Multimedia» more  ICMCS 2005»
16 years 11 days ago
A proposal of butterfly-graph based stream authentication over lossy networks
In this paper, we propose a butterfly-graph based stream authentication scheme for lossy networks where the streaming packets could be lost in both random and burst ways. Due to t...
Zhishou Zhang, Qibin Sun, Wai-Choong Wong
AIRWEB
2005
Springer
16 years 9 days ago
Pagerank Increase under Different Collusion Topologies
We study the impact of collusion –nepotistic linking– in a Web graph in terms of Pagerank. We prove a bound on the Pagerank increase that depends both on the reset probability...
Ricardo A. Baeza-Yates, Carlos Castillo, Vicente L...
CSCLP
2005
Springer
16 years 7 days ago
A CSP Search Algorithm with Reduced Branching Factor
This paper presents an attempt to construct a ”practical” CSP algorithm that assigns a variable with 2 values at every step. Such a strategy has been successfully used for cons...
Igor Razgon, Amnon Meisels
ACST
2006
15 years 8 months ago
An efficient search algorithm for partially ordered sets
Consider the problem of membership query for a given partially ordered set. We devise a greedy algorithm which can produce near-optimal search strategies. Rigorous analysis has be...
Yan Chen