For many years Alexey Karapetyants (Ph.D., professor at SFedU, director of the Regional Mathematical Center of SFedU) has been teaching the lecture course on equations of mathematical physics for students of SFedU, and in several occasions he has taught separate chapters for students of the University of Padua (Italy) and for graduate students of the University of Helsinki (Finland). Vladislav Kravchenko (Ph.D., professor of the scientific center CINVESTAV, Mexico) has taught separate chapters for graduate students of this scientific center and a semester course at SFedU.