Introduction
This books series features high quality monographs, covering topics in mathematical analysis, or at the interface between mathematics and other disciplines, such as continuum physics, biology, and economics. Ideally, a contribution will be usable as a textbook for a topical course at graduate level. It should provide readers with a comfortable amount of background material, a comprehensive presentation of the key results, and an overview of current research directions. In the evaluation of manuscripts, a systematic presentation and the clarity of exposition will be emphasized. Extended surveys of a research area which has experienced major recent advances, or important new applications, are also welcome.