Ruth N. Halls Professor of Mathematics David Fisher will be a Simons Fellow in the Mathematical Sciences for the upcoming academic year. The award is based on the scientific accomplishments in the previous five years and on the potential scientific impact of the work to be done during the coming year. The program extends sabbatical leaves, providing funding for extending the leave to the whole year. In Fall 2020 he will be a Simons Research Professor at the Mathematical Sciences Research Institute in Berkeley, California. In Spring 2021 he will be a Miller Research Professor at The University of California, Berkeley.