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131
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STOC
2006
ACM
113views Algorithms» more  STOC 2006»
15 years 9 months 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
ICRA
2002
IEEE
92views Robotics» more  ICRA 2002»
15 years 8 months ago
Resolution Complete Rapidly-Exploring Random Trees
Trajectory design for high-dimensional systems with nonconvex constraints is a challenging problem considered in this paper. Classical dynamic programming is often employed, but c...
Peng Cheng, Steven M. LaValle
147
Voted
ALENEX
2003
137views Algorithms» more  ALENEX 2003»
15 years 5 months ago
The Markov Chain Simulation Method for Generating Connected Power Law Random Graphs
Graph models for real-world complex networks such as the Internet, the WWW and biological networks are necessary for analytic and simulation-based studies of network protocols, al...
Christos Gkantsidis, Milena Mihail, Ellen W. Zegur...
156
Voted
INFOCOM
2012
IEEE
13 years 6 months ago
Sampling directed graphs with random walks
Abstract—Despite recent efforts to characterize complex networks such as citation graphs or online social networks (OSNs), little attention has been given to developing tools tha...
Bruno F. Ribeiro, Pinghui Wang, Fabricio Murai, Do...
JAIR
2002
182views more  JAIR 2002»
15 years 3 months ago
An Analysis of Phase Transition in NK Landscapes
In this paper, we analyze the decision version of the NK landscape model from the perspective of threshold phenomena and phase transitions under two random distributions, the unif...
Yong Gao, Joseph C. Culberson