| Zero{suppressed binary decision diagrams (ZBDDs) have been introduced by Minato in 14]{{17]. Here the structural properties of ZBDDs are worked out and a generic synthesis algorithm is presented and analyzed. It is proved that ZBDDs can be at most by a factor n+1 smaller or larger than ordered BDDs (OBDDs) for the same function on n variables. Using ZBDDs the best known bounds on the number o...

(Abstract) Frequent itemset mining is one of the fundamental techniques for data mining and knowledge discovery. In the last decade, a number of efficient algorithms for frequent itemset mining have been presented, but most of them focused on just enumerating the itemsets which satisfy the given conditions, and it was a different matter how to store and index the mining result for efficient dat...

the production, distribution, and consumption of information are the most important development indices of any nation. plenty of opportunities were created by e-learning which have overall paved the grounds for and enriched the presentation of learning materials through advanced audiovisual educational facilities. such learning environments are by and large flexible and provide more appropriate...