419 (Continued) 
A. V. Ivanov 
I. V. Lebedev 
A. S. Metel'skiy 
N. I. Posnov 
D. A. Suprunenko, Corresponding Academician (Belorussian S.S.R.) 
N. P. Yerugin, Academician (Belorussian S.S.R.), Head of 
Laboratory of Ordinary Differential Equations 
Description: 
The Institute works on the application of the general theory of 
linear groups and has completed several problems related to the theory of 
local nilpotent principles of linear groups. A new method, called the 
method of indexials, has been developed for the calculation of the subgroups 
in terminal groups. The stability of the solutions of linear systems of 
differential equations with periodic and nonperiodic coefficients of small 
parameters has also been investigated by the Institute. Methods using 
Green's function to solve many other problems of mathematical physics for 
homogeneous layered bodies with unstable contact between the layers and under 
nonuniform limiting conditions were also developed by the Institute. 
420 
Name: Institute of Mathematics and Computer Center 
(Institut matematiki i vychislitel'nyy tsentr) 
Address: Novosibirsk 
Director: S. L. Sobolev, Academician (U.S.S.R.) (1961) 
Deputy Directors: Yu. G. Kosarev 
E. V. Yevreinov 
Administrative Affiliation: Siberian Department, Academy of Sciences, 
MMT SHAT rivccname fas talscsoeR- (GOL) 
Selected Staff Members: 
P. Belinskiy 
V. Bitsadze, Corresponding Academician (U.S.S.R.) 
V. Kantorovich, Corresponding Academician (U.S.S.R.) 
I. Mal'tsev, Academician (U.S.S.R.) 
D. Taymanov, Doctor 
V. Shirkov, Corresponding Academician (U.S.S.R.) 
Sobolev, Academician (U.S.S.R.) 
NOP Prd 
5 
Description: 
This institute is working for a number of research institutes and 
industrial enterprises. The Computation Center consists of four computers 
used in support of the activities of the Institute of Mathematics. The 
