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The density of the ISE and local limit laws for embedded trees

Mireille Bousquet-Mélou·Svante Janson
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Abstract

It has been known for a few years that the occupation measure of several models of embedded trees converges, after a suitable normalization, to the random measure called ISE (Integrated SuperBrownian Excursion). Here, we prove a local version of this result: ISE has a (random) Hölder continuous density, and the vertical profile of embedded trees converges to this density, at least for some such trees. As a consequence, we derive a formula for the distribution of the density of ISE at a given point. This follows from earlier results by Bousquet-Mélou on convergence of the vertical profile at a fixed point. We also provide a recurrence relation defining the moments of the (random) moments of ISE.

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Mireille Bousquet-Mélou, Svante Janson. 2006-04-10. The density of the ISE and local limit laws for embedded trees. https://arxiv.org/abs/math/0509322

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