| Summary: | Collects five monographs by Russian researchers that investigate non- stationary dynamical problems related to gravitational influences and the motion of stars in galaxies. The five papers study inverse and direct problems of dynamics for binary systems with non-stationary Lagrangian, two-body and n-body non-stationary problems of celestial mechanics, the restricted photo-gravitational three-body problem, osculating intermediate orbits, and a virial theorem for a system of fluctuating composition. An editor could have easily corrected the numerous grammatical errors and improved the volume's readability. Annotation c. Book News, Inc., Portland, OR (booknews.com)
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