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» On Linear Programming Relaxations for Unsplittable Flow in T...
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JMLR
2006
125views more  JMLR 2006»
11 years 5 months ago
Linear Programming Relaxations and Belief Propagation - An Empirical Study
The problem of finding the most probable (MAP) configuration in graphical models comes up in a wide range of applications. In a general graphical model this problem is NP hard, bu...
Chen Yanover, Talya Meltzer, Yair Weiss
ICML
2006
IEEE
12 years 6 months ago
Quadratic programming relaxations for metric labeling and Markov random field MAP estimation
Quadratic program relaxations are proposed as an alternative to linear program relaxations and tree reweighted belief propagation for the metric labeling or MAP estimation problem...
Pradeep D. Ravikumar, John D. Lafferty
ORL
2008
91views more  ORL 2008»
11 years 5 months ago
On the integrality ratio for tree augmentation
We show that the standard linear programming relaxation for the tree augmentation problem in undirected graphs has an integrality ratio that approaches 3 2 . This refutes a conjec...
Joseph Cheriyan, Howard J. Karloff, Rohit Khandeka...
PLDI
1994
ACM
11 years 9 months ago
The Program Structure Tree: Computing Control Regions in Linear Time
In this paper, we describe the program structure tree (PST), a hierarchical representation of program structure based on single entry single exit (SESE) regions of the control flo...
Richard Johnson, David Pearson, Keshav Pingali
SODA
2003
ACM
133views Algorithms» more  SODA 2003»
11 years 6 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...
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