Yaroslav P. Sysak: 1993 Highest degree, Doctor of Sciences in Physics and Mathematics (doctoral thesis: Radical modules and their application in the theory of factorized groups); 1977 Final degree: Candidate of Sciences in Physics and Mathematics (thesis: Groups with complemented elementary abelian subgroups of non-prime orders); 1973-1976 Post-graduate research student at the Institute of Mathematics at the Ukrainian Academy of Sciences, Kiev; Doctor father: Corresponding Member of the Ukrainian Academy of Sciences, Prof. S. N. Chernikov; 1966-1971 Student of Mathematics at Lviv State University, Faculty of Mechanics and Mathematics (Diploma degree in Mathematics); 1955-1966 Middle school of general education in Kolomyya, Ivano-Frankivsk region. Professional experience: 1994-till now Leading scientist at the Institute of Mathematics at the Ukrainian National Academy of Sciences, Kiev; 1994-2000 Professor at the Department of Algebra, Taras Shevchenko University, Kiev; 1988-1993 Lecturer at the Department of Algebra, Taras Shevchenko University, Kiev; 1984-1994 Senior Researcher at the Institute of Mathematics of the Ukrainian Academy of Sciences, Kiev; 1976-1984 Junior researcher at the Institute of Mathematics of the Ukrainian Academy of Sciences, Kiev; 1971-1973 Systems engineer at the Lviv Department of the production association Ukravtomatika.