History of Science and Engineering Annotation << Back System Analysis Research Center of PSI RAS: Results of Research A.M. Tsirlin, V.A. Yumaguzhin, S.V. Znamenskil Results of researches of the System Analysis Research Center of PSI RAS are presented. Three main fields of the research work namely optimization of macrosystems of physical and economic nature, description of differential invariants and investigation of convolution equations are pointed out. Key words: macrosystems, irreversibility, dissipation, averaged optimization, optimal control, extreme performance, thermodynamics, microeconomics, differential invariants, convolution equations, complex domain. e-mail: tsirlin@sarc.botik.ru