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The Central Aerohydrodynamic Institute (TsAGI) has been one of the most famous and influential scientific, engineering, aviation centers in the world for decades. For this legacy it is in debt to outstanding people such as N. E. Zhukovsky, S. A. Chaplygin, A. N. Tupolev, B. N. Yuryev, A. N. Nekrasov, N. E. Kochin, L. S. Leybenzon, M. A. Lavrentyev, S. A. Khristianovich, and M. V. Keldysh. February 10, 2011, marks 100 years since the birth of academician Mstislav V. Keldysh (1911–1978), the outstanding scientist in mathematics and mechanics. M. V. Keldysh arrived at TsAGI in 1931 after working in the Department of Physics and Mathematics of the Moscow State University. Then and later, major mathematicians who knew the measure of his talent in the field, in particular Academician Luzin, considered it a mistake that he did not focus on abstract, ”pure” mathematics but on the applied fields. But history has shown that it is due to his work in applied mathematics and engineering that Mstislav V. Keldysh reached the heights of a truly world class scientist, and it was his work at TsAGI which became for him an important milestone and a reliable starting point for his further impressive scientific ascent. Those who worked at TsAGI in the early 1930s admired the atmosphere of high science, optimism, and mutual respect that prevailed at the Institute. This atmosphere was formed around those at the intellectual and spiritual core of the Institute, the disciples of Zhukovsky and, above all, academician Sergei A. Chaplygin, who became for the young Keldysh a close and shining example. The irreplaceable chairman of the board of TsAGI, a brilliant mathematician and mechanician, Chaplygin, led the famous seminar of general theoretical groups of TsAGI for many years. In regular sessions of the seminar, in keenly critical style while maintaining an objective and benevolent atmosphere, subsequent outstanding researchers-engineers, future academicians such as N. E. Kochin, M. A. Lavrentyev, L. S. Leybenzon, L. I. Se-

FOR THE 100th ANNIVERSARY OF THE MSTISLAV V. KELDYSH'S BIRTH. THE BEGINNING OF CREATIVE WAYS: WORK AT TSAGI