554 search results - page 11 / 111 » Approximation algorithms and hardness results for labeled co... |
FOCS
2006
IEEE
14 years 1 months ago
2006
IEEE
Given an undirected hypergraph and a subset of vertices S ⊆ V with a specified root vertex r ∈ S, the STEINER ROOTED-ORIENTATION problem is to find an orientation of all the...
STACS
2005
Springer
14 years 1 months ago
2005
Springer
Abstract. We consider data structures and algorithms for preprocessing a labelled list of length n so that, for any given indices i and j we can answer queries of the form: What is...
COCO
2006
Springer
13 years 11 months ago
2006
Springer
We consider a general approach to the hoary problem of (im)proving circuit lower bounds. We define notions of hardness condensing and hardness extraction, in analogy to the corres...
CC
2007
Springer
13 years 7 months ago
2007
Springer
We prove that if NP ⊆ BPP, i.e., if SAT is worst-case hard, then for every probabilistic polynomial-time algorithm trying to decide SAT, there exists some polynomially samplable ...
CVPR
2009
IEEE
15 years 2 months ago
2009
IEEE
Markov random field (MRF, CRF) models are popular in
computer vision. However, in order to be computationally
tractable they are limited to incorporate only local interactions
a...