Foreign member of the National Academy of Sciences of Armenia Leon Petrosyan was elected the chairman of the International Society of Dynamic Games (ISDG).

Leon Petrosyan has headed the Department of applied mathematics - processes of development of St. Petersburg University for 35 years. Until recently he also acted as president of Russia's office of the International Society of dynamic games. A prominent scientist Leon Petrosyan is the author of more than 200 scientific articles, 20 monographs. His writings have been translated and published in the United States, Britain and China. Leon Petrosyan works closely with the National Academy of Sciences of Armenia and the scientific and educational institutions of Armenia