O.V. Druzhinina - Dr.Sc. (Phys.-Math.), Professor, Dorodnicyn Computing Center of RAS E-mail: ov-druzh@mail.ru O.N. Masina - Dr.Sc. (Phys.-Math.), Assistant Professor, Department of Automated Systems of Control and Mathematical softwAre, Yelets State University named after I.A. Bunin, E-mail: olga121@inbox.ru