This and the next two slides were provided by Professor Igor V. Andrianov, Department of General Mechanics, RWTH Aachen Universithy, Aachen, Germany
Translations of the names (row,column):
(2,2) = F. S. Yasinskii
(2,3) = A. M. Liapunov (Lyapunov)
(3,1) B. G. Galerkin
(3,2) = I. G. Bubnov
(3,4) = A. N. Dinnik
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