utility; ignoring the principle of democratic centralism as the basis of the socialist theory, exchanging it for the so-called principle of hierarchical structure; borrowing notions from bourgeois theories (marginal utility theory, the notion of market socialism and the theory of factors of production, the ideal of automatic regulation of the socialist economy by 'optimal plan prices'); denying the laws of reproduction; and gradually exchanging the Marxist-Leninist theory of reproduction for the bourgeois theory of equilibrium". (see M. Bor and S. Logvinov (1975), quoted by Pekka Sutela (1991), p. 87) Another Soviet planning economist N.Baibakov regarded SOFE as a suspect theoretical construct. (see N. Baibakov (1974), quoted by Sutela Pekka pp. 86) It should be mentioned, that Karl Marx has also used mathematical methodes in order to analyze the capitalist economic system. For example, he discussed the form of goods circulation with simple formulas W-G-W or G-W-G (see Karl Marx (2020), pp, 149), or the ratio of added value m/c or m/(c+v) (see pp. 210) and the exploitation level of work force, as well as ratio and mass of additional value M = m/v x V; k x a´/a x n (see pp. 292). These formulas are far away to be really complex, but Karl Marx used them in order to get a better understanding, how - according to his ideas - the capitalist system works. Nobody can imagine, how political economics without any formulas could really work. We come back to Soviet economics and the SOFE concept. An innovative feature of the SOFE approach was its vision of connecting together the different levels of the national economy with computers, which would carry out the calculation of the mathematical planning formulas. This was a precursor of the use of the internet. The idea of using mathematical planning methods and computers remains valid even in today's globalized economy. The corona crisis in 2020 also requires mathematical analysis and forecasting at national, regional and global level. Despite all ideological attacks Fedorenko remained in his position in CEMI. A Doctor of Economic Sciences, he also was an Honorary Director of CEMI since 1992, a member of the American Econometric Society (from 1966), a member of the International Economical Society (from 1967) and an Honorary Director of the Warsaw School of Planning and Statistics. He has written several books and many articles on optimal planning and SOFE, mostly in Russian, some translated into English. The