par Louchard, Guy ;Prodinger, Helmut
Référence Discrete mathematics and theoretical computer science, 12, 2, page (185-196)
Publication Publié, 2010
Article révisé par les pairs
Résumé : Following the model of Bondesson, Nilsson, and Wikstrand, we consider randomly filled urns, where the probability of falling into urn i is the geometric probability (1 - q)qi-1. Assuming n independent random entries, and a fixed parameter k, the interest is in the following parameters: Let T be the smallest index, such that urn T is non-empty, but the following k are empty, then: XT = number of balls in urn T, ST = number of balls in urns with index larger than T, and finally T itself. We analyse the recursions (that appeared earlier) precisely, and derive results about the joint distribution of a related urn model. © 2010 Discrete Mathematics and Theoretical Computer Science (DMTCS).