Generalized Polya urns via stochastic approximation

Details Generalized Polya urns via stochastic approximation Generalized Polya urns via stochastic approximation

2010-02-19

arxiv.org/abs/1002.3716v1

Mathematics

Probability

Licentiate thesis, 40 pages, 1 figure

Scientific paper

We collect, survey and develop methods of (one-dimensional) stochastic approximation in a framework that seems suitable to handle fairly broad generalizations of Polya urns. To show the applicability of the results we determine the limiting fraction of balls in an urn with balls of two colors. We consider two models generalizing the Polya urn, in the first one ball is drawn and replaced with balls of (possibly) both colors according to which color was drawn. In the second, two balls are drawn simultaneously and replaced along with balls of (possibly) both colors according to what combination of colors were drawn.

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