DMTCS Proceedings, 2005 International Conference on Analysis of Algorithms

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The number of distinct values of some multiplicity in sequences of geometrically distributed random variables

Guy Louchard, Helmut Prodinger, Mark Daniel Ward


We consider a sequence of n geometric random variables and interpret the outcome as an urn model. For a given parameter m, we treat several parameters like what is the largest urn containing at least (or exactly) m balls, or how many urns contain at least m balls, etc. Many of these questions have their origin in some computer science problems. Identifying the underlying distributions as (variations of) the extreme value distribution, we are able to derive asymptotic equivalents for all (centered or uncentered) moments in a fairly automatic way.

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