796 search results - page 77 / 160 » Approximating the centroid is hard |
FOCS
2009
IEEE
14 years 2 months ago
2009
IEEE
— We study the complexity of rationalizing network formation. In this problem we fix an underlying model describing how selfish parties (the vertices) produce a graph by making...
ICALP
2005
Springer
14 years 1 months ago
2005
Springer
In this paper we initiate the study of the AND-OR directed feedback vertex set problem from the viewpoint of approximation algorithms. This AND-OR feedback vertex set problem is m...
COMPGEOM
2008
ACM
13 years 9 months ago
2008
ACM
We consider the problem of finding a maximum number of disjoint paths for unit disks moving amidst static or dynamic obstacles. For the static case we give efficient exact algorit...
CVPR
2004
IEEE
14 years 9 months ago
2004
IEEE
We present a new variational framework for recovery of apparent diffusion coefficient (ADC) from High Angular Resolution Diffusion-weighted (HARD) MRI. The model approximates the ...
PODS
2004
ACM
14 years 7 months ago
2004
ACM
We study the problem of answering queries over sources with limited access patterns. Given a first-order query Q, the problem is to decide whether there is an equivalent query whi...