# Non-Linear Partial Differential Equations, Mathematical Physics, and Stochastic Analysis

The Helge Holden Anniversary Volume

## Editors

### Fritz Gesztesy

Baylor University, Waco, USA### Harald Hanche-Olsen

The Norwegian University of Science and Technology, Trondheim, Norway### Espen R. Jakobsen

The Norwegian University of Science and Technology, Trondheim, Norway### Yurii I. Lyubarskii

The Norwegian University of Science and Technology, Trondheim, Norway### Nils Henrik Risebro

University of Oslo, Norway### Kristian Seip

Norwegian University of Science and Technology, Trondheim, Norway

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This volume is dedicated to Helge Holden on the occasion of his 60th anniversary. It collects contributions by numerous scientists with expertise in non-linear partial differential equations (PDEs), mathematical physics, and stochastic analysis, reflecting to a large degree Helge Holden’s longstanding research interests. Accordingly, the problems addressed in the contributions deal with a large range of topics, including, in particular, infinite-dimensional analysis, linear and nonlinear PDEs, stochastic analysis, spectral theory, completely integrable systems, random matrix theory, and chaotic dynamics and sestina poetry. They represent to some extent the lectures presented at the conference *Non-linear PDEs, Mathematical Physics and Stochastic Analysis*, held at NTNU, Trondheim, July 4–7, 2016 (https://wiki.math.ntnu.no/holden60).

The mathematical tools involved draw from a wide variety of techniques in functional analysis, operator theory, and probability theory.

This collection of research papers will be of interest to any active scientist working in one of the above mentioned areas.