Preface: Applications of mathematical analysis to problems in theoretical physics.

Guest Editors: Vieri Benci Dipartimento di Matematica, Universit a di Pisa Via Filippo Buonarroti 1/C, 56127 Pisa, Italy vieri.benci@unipi.it Sunra Mosconi Dipartimento di Matematica e Informatica, Universit a di Catania Viale A. Doria 6, 95125 Catania, Italy sunra.mosconi@unict.it Marco Squassina Dipartimento di Matematica e Fisica, Universit a Cattolica del Sacro Cuore Via dei Musei 41, I-25121 Brescia, Italy marco.squassina@unicatt.it i Copyright of Discrete & Continuous Dynamical Systems- Series S is the property of American Institute of Mathematical Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. DISCRETE AND CONTINUOUS doi:10.3934/dcdss.2020446 DYNAMICAL SYSTEMS SERIES S Volume 14, Number 5, May 2021 pp. i{i PREFACE: APPLICATIONS OF MATHEMATICAL ANALYSIS TO PROBLEMS IN THEORETICAL PHYSICS This issue of DCDS-S contains selected contributions on the applications of mathematical analysis to various problems of theoretical physics, by leading experts in the eld. [Extracted from the article]