An itemset X is called a generator on a data set D if there
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An itemset X is called a generator on a data set D if there does not exist a proper sub-itemset Y ? X such that support(
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An itemset X is called a generator on a data set D if there does not exist a proper sub-itemset Y ? X such that support(X) = support(Y). A generator X is a frequent generator if support(X) passes the minimum support threshold. Let G be the set of all frequent generators on a data set D. (a) Can you determine whether an itemset A is frequent and the support of A, if it is frequent, using only G and the support counts of all frequent generators? If yes, present your algorithm. Otherwise, what other information is needed? Can you give an algorithm assuming the information needed is available? (b) What is the relationship between closed itemsets and generators?
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