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math.PR2025
A random recursive tree model with doubling events
Jakob E. Björnberg, Cécile Mailler
We introduce a new model of random tree that grows like a random recursive tree, except at some exceptional "doubling events" when the tree is replaced by two copies of itself atta…
math.PR2012
Coexistence and non-coexistence of Markovian viruses and their hosts
Jakob E. Björnberg, Erik I. Broman
The possibility of coexistence of two competing populations is a classical question which dates back to the earliest `predator-prey' models. In this paper we study this question in…