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» On the hyperbolicity constant in graphs
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STOC
2007
ACM
134views Algorithms» more  STOC 2007»
16 years 7 months ago
Hardness of routing with congestion in directed graphs
Given as input a directed graph on N vertices and a set of source-destination pairs, we study the problem of routing the maximum possible number of source-destination pairs on pat...
Julia Chuzhoy, Venkatesan Guruswami, Sanjeev Khann...
SODA
2010
ACM
235views Algorithms» more  SODA 2010»
16 years 4 months ago
Algorithmic Lower Bounds for Problems Parameterized by Clique-width
Many NP-hard problems can be solved efficiently when the input is restricted to graphs of bounded tree-width or clique-width. In particular, by the celebrated result of Courcelle,...
Fedor V. Fomin, Petr A. Golovach, Daniel Lokshtano...
ISCAS
2006
IEEE
118views Hardware» more  ISCAS 2006»
16 years 24 days ago
Complex network topologies and synchronization
Synchronization in networks with different topolo- is shown that for typical systems only three main scenarios gies is studied. We show that for a large class of oscillators there ...
Paolo Checco, Mario Biey, Gábor Vattay, Lju...
ESA
2005
Springer
108views Algorithms» more  ESA 2005»
16 years 9 days ago
Bootstrapping a Hop-Optimal Network in the Weak Sensor Model
Sensor nodes are very weak computers that get distributed at random on a surface. Once deployed, they must wake up and form a radio network. Sensor network bootstrapping research t...
Martin Farach-Colton, Rohan J. Fernandes, Miguel A...
CORR
2010
Springer
94views Education» more  CORR 2010»
15 years 5 months ago
When LP is the Cure for Your Matching Woes: Improved Bounds for Stochastic Matchings
Abstract Consider a random graph model where each possible edge e is present independently with some probability pe. Given these probabilities, we want to build a large/heavy match...
Nikhil Bansal, Anupam Gupta, Jian Li, Juliá...