Andrey Venediktovich Dmitruk was born on the 19 of February,1951 in Saratov. He is a student of Aleksey Alekseyevich Milyutin. He is a leading researcher at the Central Economic Mathematical Institute of the Russian Academy of Sciences, Doctor of Science (1994), author of about 60 scientific publications and one monography. At the GPC department Dmitruk works as a part-time professor, leads the seminar on non-linear analysis and extremal problems. Some of his articles are available at http://dmitruk.tripod.com. e-mail: mailto:avdmi@cemi.rssi.ru