Ramon Plaza is a professor and head of the Department of Mathematics and Mechanics at the Institute of Applied Mathematics and Systems of the National Autonomous University of Mexico, who has been repeatedly invited to visit universities in Mexico and Europe. He works in the field of applied nonlinear differential equations, Professor Plaza's interests include the stability of shock profiles, propagation of nonlinear waves, hydrodynamic stability, dynamics of phase transitions in continuum mechanics and mathematical biology, etc.

On June 27, at the seminar of the Russian Scientific Research Center of the Southern Federal University, Professor Plaza gave a lecture on the theory of instability of stationary profiles for the sine-Gordon equation on the Y-junction graph. Applications of the model include the study of three-crystal boundaries of Josephson junctions in superconductivity theory

The seminar "Seminar on Analysis, Differential Equations and Mathematical Physics" was attended by more than thirty mathematicians - specialists from leading scientific and educational centers of the world in Russia and other countries, including graduate students and students of the Faculty of Mechanics and Mathematics of the Southern Federal University and young scientists.

Online scientific seminar of the Regional Scientific and Educational Mathematical Center (https://rmc.sfedu.ru /) it is held regularly every two weeks, announcements of new seminars and videos of previous seminars are available on the website http://msrn.sfedu.ru/sl . The seminar is attended by leading researchers from around the world whose research interests are related to analysis, differential equations and mathematical physics. The scientific seminar of the mathematical center is open, and everyone can take part in it.