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Cantor-de Waal multiset
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A Cantor-de Waal multiset is a multiset in which a particular integer appears at regular intervals. It was proposed by Cornelis de Waal of the Department of Philosophy of IUPUI. More specifically, the n order Cantor-de Waal multiset for value k would have every n entry equal to k. For example, the 5 order Cantor-de Waal multiset, value 8 would have every 5 element of the multiset equal to 8. These multisets are particullarly useful for calculating cardinalities of Z-related infinite sets. In the case of finite sets of integers the method of Cantor-de Waal multisets reduces to the usual calculation, however for infinite Z-related sets, the method of Cantor-de Waal multisets can be up to three faster than any other method. On a historical note, the Cantor-de Waal multiset is named for its inventor, Cornelis de Waal, and for mathematician Georg Cantor 1845 - 1918 See Also
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