A note on Pólya urns: the winner may lead all the time

Fuente: arXiv
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Autor principal: Janson, Svante
Formato: Preprint
Publicado: 2025
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author Janson, Svante
author_facet Janson, Svante
contents Consider a Pólya urn where a drawn ball of colour $i$ is replaced together with a fixed number $m_i$ of balls of the same colour. We give a simple proof that if, for example, there are two colours and the urn starts with more balls of colour 1 than 2, and $m_1\ge m_2$, then there is a positive probability that there always will be more balls of colour 1 than colour 2.
format Preprint
id arxiv_https___arxiv_org_abs_2506_14859
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle A note on Pólya urns: the winner may lead all the time
Janson, Svante
Probability
60C05
Consider a Pólya urn where a drawn ball of colour $i$ is replaced together with a fixed number $m_i$ of balls of the same colour. We give a simple proof that if, for example, there are two colours and the urn starts with more balls of colour 1 than 2, and $m_1\ge m_2$, then there is a positive probability that there always will be more balls of colour 1 than colour 2.
title A note on Pólya urns: the winner may lead all the time
topic Probability
60C05
url https://arxiv.org/abs/2506.14859