51 search results - page 1 / 11 » A Pseudopolynomial Time O (log n )-Approximation Algorithm f... |
WADS
2007
Springer
13 years 10 months ago
2007
Springer
In this paper, we give a O(log copt)-approximation algorithm for the point guard problem where copt is the optimal number of guards. Our algorithm runs in time polynomial in n, the...
SMA
2008
ACM
13 years 4 months ago
2008
ACM
In this paper we consider the problem of monitoring an art gallery modeled as a polygon, the edges of which are arcs of curves. We consider two types of guards: edge guards (these...
STOC
2009
ACM
14 years 5 months ago
2009
ACM
We show how to compute the edit distance between two strings of length n up to a factor of 2 ~O( log n) in n1+o(1) time. This is the first sub-polynomial approximation algorithm f...
JACM
1998
13 years 4 months ago
1998
Given a collection Ᏺ of subsets of S ϭ {1, . . . , n}, set cover is the problem of selecting as few as possible subsets from Ᏺ such that their union covers S, and max k-cover ...
CIAC
2006
Springer
13 years 8 months ago
2006
Springer
We consider the minimum line covering problem: given a set S of n points in the plane, we want to find the smallest number l of straight lines needed to cover all n points in S. W...