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» Finding Answers to Complex Questions
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STACS
2010
Springer
14 years 5 months ago
Treewidth Reduction for Constrained Separation and Bipartization Problems
We present a method for reducing the treewidth of a graph while preserving all the minimal s−t separators. This technique turns out to be very useful in the design of parameteriz...
Dániel Marx, Barry O'Sullivan, Igor Razgon
DAGSTUHL
2006
13 years 11 months ago
Graphs and Circuits: Some Further Remarks
We consider the power of single level circuits in the context of graph complexity. We first prove that the single level conjecture fails for fanin-2 circuits over the basis {, , 1...
Stasys Jukna
TCC
2009
Springer
130views Cryptology» more  TCC 2009»
14 years 10 months ago
How Efficient Can Memory Checking Be?
We consider the problem of memory checking, where a user wants to maintain a large database on a remote server but has only limited local storage. The user wants to use the small ...
Cynthia Dwork, Moni Naor, Guy N. Rothblum, Vinod V...
SODA
2010
ACM
202views Algorithms» more  SODA 2010»
14 years 7 months ago
Counting Inversions, Offline Orthogonal Range Counting, and Related Problems
We give an O(n lg n)-time algorithm for counting the number of inversions in a permutation on n elements. This improves a long-standing previous bound of O(n lg n/ lg lg n) that ...
Timothy M. Chan, Mihai Patrascu
VLDB
1999
ACM
107views Database» more  VLDB 1999»
14 years 2 months ago
The Value of Merge-Join and Hash-Join in SQL Server
Microsoft SQL Server was successful for many years for transaction processing and decision support workloads with neither merge join nor hash join, relying entirely on nested loop...
Goetz Graefe