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IANDC
2011
91views more  IANDC 2011»
13 years 6 months ago
Queries on Xml streams with bounded delay and concurrency
Query answering algorithms on Xml streams check answer candidates on the fly in order to avoid the unnecessary buffering whenever possible. The delay and concurrency of a query ...
Olivier Gauwin, Joachim Niehren, Sophie Tison
IJFCS
2010
67views more  IJFCS 2010»
13 years 10 months ago
Number of Occurrences of powers in Strings
Abstract. We show a Θ(n log n) bound on the maximal number of occurrences of primitively-rooted k-th powers occurring in a string of length n for any integer k, k ≥ 2. We also s...
Maxime Crochemore, Szilárd Zsolt Fazekas, C...
DAM
2000
78views more  DAM 2000»
13 years 11 months ago
Maximal cubic graphs with diameter 4
We prove that there is no cubic graph with diameter 4 on 40 vertices. This implies that the maximal number of vertices of a (3,4)-graph is 38. ? 2000 Elsevier Science B.V. All rig...
Dominique Buset
EJC
2010
13 years 11 months ago
Packing sets of patterns
Packing density is a permutation occurrence statistic which describes the maximal number of permutations of a given type that can occur in another permutation. In this article we ...
Alexander Burstein, Peter Hästö
ACTA
2007
85views more  ACTA 2007»
13 years 11 months ago
The complexity of satisfying constraints on databases of transactions
Abstract Computing frequent itemsets is one of the most prominent problems in data mining. Recently, a new related problem, called FREQSAT, was introduced and studied: given some i...
Toon Calders
IJCAI
1997
14 years 26 days ago
Minimum Splits Based Discretization for Continuous Features
Discretization refers to splitting the range of continuous values into intervals so as to provide useful information about classes. This is usually done by minimizing a goodness m...
Ke Wang, Han Chong Goh
BIRTHDAY
2009
Springer
14 years 6 months ago
Combinatorial Problems for Horn Clauses
Given a family of Horn clauses, what is the minimal number of Horn clauses implying all other clauses in the family? What is the maximal number of Horn clauses from the family wit...
Marina Langlois, Dhruv Mubayi, Robert H. Sloan, Gy...
PODS
2004
ACM
130views Database» more  PODS 2004»
14 years 11 months ago
Computational Complexity of Itemset Frequency Satisfiability
Computing frequent itemsets is one of the most prominent problems in data mining. We introduce a new, related problem, called FREQSAT: given some itemset-interval pairs, does ther...
Toon Calders
STOC
2006
ACM
121views Algorithms» more  STOC 2006»
14 years 12 months ago
Narrow proofs may be spacious: separating space and width in resolution
The width of a resolution proof is the maximal number of literals in any clause of the proof. The space of a proof is the maximal number of clauses kept in memory simultaneously if...
Jakob Nordström