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DCG
2010
137views more  DCG 2010»
13 years 8 months ago
Improved Results on Geometric Hitting Set Problems
We consider the problem of computing minimum geometric hitting sets in which, given a set of geometric objects and a set of points, the goal is to compute the smallest subset of p...
Nabil H. Mustafa, Saurabh Ray
JCO
2008
76views more  JCO 2008»
13 years 8 months ago
On the inapproximability of the exemplar conserved interval distance problem of genomes
In this paper we present two main results about the inapproximability of the exemplar conserved interval distance problem of genomes. First, we prove that it is NP-complete to deci...
Zhixiang Chen, Richard H. Fowler, Bin Fu, Binhai Z...
IANDC
2007
117views more  IANDC 2007»
13 years 8 months ago
Computing the edit distance of a regular language
The edit distance (or Levenshtein distance) between two words is the smallest number of substitutions, insertions, and deletions of symbols that can be used to transform one of the...
Stavros Konstantinidis
SIAMCOMP
2008
108views more  SIAMCOMP 2008»
13 years 7 months ago
The Euclidean Orienteering Problem Revisited
We consider the rooted orienteering problem: Given a set P of n points in the plane, a starting point r P, and a length constraint B, one needs to find a path starting from r tha...
Ke Chen 0006, Sariel Har-Peled
JDA
2007
83views more  JDA 2007»
13 years 7 months ago
Optimal leaf ordering of complete binary trees
Ordering a set of items so as to minimize the sum of distances between consecutive elements is a fundamental optimization problem occurring in many settings. While it is NP-hard i...
Ulrik Brandes