536 search results - page 20 / 108 » The hardness and approximation algorithms for l-diversity |
FOCS
2008
IEEE
14 years 2 months ago
2008
IEEE
We study the problem of finding the minimum size DNF formula for a function f : {0, 1}d → {0, 1} given its truth table. We show that unless NP ⊆ DTIME(npoly(log n) ), there i...
IPL
2008
13 years 8 months ago
2008
The Positive-Negative Partial Set Cover problem is introduced and its complexity, especially the hardness-of-approximation, is studied. The problem generalizes the Set Cover probl...
SODA
2007
ACM
13 years 9 months ago
2007
ACM
We study the problem of aggregating partial rankings. This problem is motivated by applications such as meta-searching and information retrieval, search engine spam fighting, e-c...
JCB
2007
13 years 7 months ago
2007
In this paper, we study the problem of computing the similarity of two protein structures ring their contact-map overlap. Contact-map overlap abstracts the problem of computing th...
APPROX
2008
Springer
13 years 10 months ago
2008
Springer
In the Survivable Network Design Problem (SNDP) one seeks to find a minimum cost subgraph that satisfies prescribed node-connectivity requirements. We give a novel approximation r...