CORR
2011
Springer
13 years 3 months ago
2011
Springer
We study the lift-and-project procedures of Lov´asz-Schrijver and Sherali-Adams applied to the standard linear programming relaxation of the traveling salesperson problem with tr...
CORR
2010
Springer
13 years 11 months ago
2010
Springer
Grothendieck inequalities are fundamental inequalities which are frequently used in many areas of mathematics and computer science. They can be interpreted as upper bounds for the ...
CORR
2010
Springer
13 years 11 months ago
2010
Springer
Recent years have seen an explosion of interest in lift and project methods, such as those proposed by Lov
IPCO
2008
14 years 26 days ago
2008
Abstract. Determining the integrality gap of the bidirected cut relaxation for the metric Steiner tree problem, and exploiting it algorithmically, is a long-standing open problem. ...
IPCO
2010
14 years 27 days ago
2010
In a column-restricted covering integer program (CCIP), all the non-zero entries of any column of the constraint matrix are equal. Such programs capture capacitated versions of cov...
APPROX
2008
Springer
14 years 1 months ago
2008
Springer
We study approximation algorithms, integrality gaps, and hardness of approximation, of two problems related to cycles of "small" length k in a given graph. The instance f...
APPROX
2008
Springer
14 years 1 months ago
2008
Springer
We consider the problem of max-min fair allocation of indivisible goods. Our focus will be on the restricted version of the problem in which there are m items, each of which assoc...
STOC
1999
ACM
14 years 3 months ago
1999
ACM
Given an undirected graph with edge costs and a subset of k ≥ 3 nodes called terminals, a multiway, or k-way, cut is a subset of the edges whose removal disconnects each termina...
ICALP
2003
Springer
14 years 4 months ago
2003
Springer
We consider requests for capacity in a given tree network T = (V, E) where each edge of the tree has some integer capacity ue. Each request consists of an integer demand df and a ...
FCT
2003
Springer
14 years 4 months ago
2003
Springer
: Proving integrality gaps for linear relaxations of NP optimization problems is a difficult task and usually undertaken on a case-by-case basis. We initiate a more systematic app...