PETROV 284 



Petrov's investigations are in automation and in approximate 



integration of differential equations. 



Bibliography: 



and others. Automatic Control of Linear Dimensions of Ob- 

 jects. Moscow: 1947. 



On construction and transformation of structural schemes. 

 Izvest. Akad. Nauk S.S.S.R., Otdel. Tekh. Nauk, 1945, #12. 



Office: Moscow Aviation Institute 



Moscow, USSR 



PETR O V, GE ORGII IVAN OVICH (Engineer in Hydro- 

 Aeromechanics and Gas Dynamics) 

 G. I. Petrov was born May 31, 1912. After graduation from 

 Moscow University in 1935 he worked in scientific research 

 institutes. In 1953 he became a professor at Moscow Universi- 

 ty. He was elected a Corresponding Member of the U.S.S.R. 

 Academy of Sciences in 1953, and in 1958 an Academician. In 

 1949 he received a Stalin Prize. 



The earlier works of Petrov were concerned with the ques- 

 tion of stability of vortex layers, the propagation of oscillations 

 in a viscous liquid, elucidation of physical conditions in the 

 destruction of laminar flow. He proved the convergence of 

 Galerkin's method for seeking the characteristic value in a 

 wide class of equations, including non-conservative systems 

 (particularly equations of oscillations in a viscous liquid). 

 Bibliography: 



On the Propagation of Oscillations in a Viscous Liquid and 

 the Appearance of Turbulence. Moscow: 1938. 

 Utilization of Galerkin's method in the problem of the sta- 

 bility of flow of a viscous liquid. Priklad. Mat. i Mekh., 

 1940, 4, #3. 

 Office: Moscow University 



Moscow, USSR 

 Residence: Prospekt Mira, 73 



Moscow, USSR 

 Telephone: II 93 31 



PETROV, NIKOLAI NIKOLAEVICH (Surgeon-oncologist) 



N. N. Petrov was born December 14, 1876. He graduated in 

 1899 from the Military Medical Academy in Petersburg (Lenin- 

 grad). In 1913 he became professor at the Institute of Advanced 

 Training of Doctors in Petersburg. He founded the Oncology 

 Institute in Leningrad in 1926 and was a scientific leader in 

 this Institute. He was elected a Corresponding Member of the 



