ALGORITHMICA
2010
13 years 5 months ago
2010
It is known to be NP-hard to decide whether a graph can be made chordal by the deletion of k vertices or by the deletion of k edges. Here we present a uniformly polynomial-time alg...
ALGORITHMICA
2010
13 years 5 months ago
2010
ALGORITHMICA
2010
13 years 5 months ago
2010
Let A be a set of size m. Obtaining the first k m elements of A in ascending order can be done in optimal O(m + k log k) time. We present Incremental Quicksort (IQS), an algorith...
ALGORITHMICA
2010
13 years 5 months ago
2010
We consider the online version of the maximum vertex disjoint path problem when the underlying network is a tree. In this problem, a sequence of requests arrives in an online fash...
ALGORITHMICA
2010
13 years 5 months ago
2010
We consider a novel class of art gallery problems inspired by wireless localization. Given a simple polygon P, place and orient guards each of which broadcasts a unique key within ...
ALGORITHMICA
2010
13 years 5 months ago
2010
We consider a data-structural problem motivated by version control of a hierarchical directory structure in a system like Subversion. The model is that directories and files can b...
ALGORITHMICA
2010
13 years 5 months ago
2010
We divide a string into k segments, each with only one sort of symbols, so as to minimize the total number of exceptions. Motivations come from machine learning and data mining. F...
ALGORITHMICA
2010
13 years 5 months ago
2010
ALGORITHMICA
2010
13 years 5 months ago
2010
We consider the following version of the stable matching problem. Suppose that men have preferences for women, women have preferences for dogs, and dogs have preferences for men. T...
ALGORITHMICA
2010
13 years 5 months ago
2010
The Burrows-Wheeler transformation is used for effective data compression, e.g., in the well known program bzip2. Compression and decompression are done in a block-wise fashion; la...