October 11-13, the International Workshop on "Discrete Mathematics and its Application in Economic and Mathematical Modeling, Information Technology" was held at ZNU. The event was attended by the scientists from 20 universities of Ukraine, Russia, Belarus and the United Kingdom. They gathered in order not only to discuss the actual problems of discrete mathematics, but also to congratulate Professor of Economic Cybernetics Vitaliy Perepelitsya on his 75th anniversary.