796 search results - page 21 / 160 » Approximating the centroid is hard |
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...
STOC
2003
ACM
14 years 24 days ago
2003
ACM
Given a k-uniform hypergraph, the Ek-Vertex-Cover problem is to find the smallest subset of vertices that intersects every hyperedge. We present a new multilayered PCP constructi...
APPROX
2007
Springer
14 years 1 months ago
2007
Springer
Abstract. We study the problem embedding an n-point metric space into another n-point metric space while minimizing distortion. We show that there is no polynomial time algorithm t...
AAAI
1997
13 years 9 months ago
1997
We present empirical evidence that the distribution of e ort required to solve CSPs randomly generated at the 50% satis able point, when using a backtracking algorithm, can be app...
CPM
2005
Springer
13 years 9 months ago
2005
Springer
Abstract. Speeding up approximate pattern matching is a line of research in stringology since the 80’s. Practically fast approaches belong to the class of filtration algorithms,...