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1957, Volume 112, Number 6  


MATHEMATICS
On elliptical systems of second order partial differential equations
A. V. Bitsadze
983
The matrix elements of irreducible unitary representations of the group of Euclidean three-dimensional space motions, and their properties
N. Ya. Vilenkin, È. L. Akim, A. A. Levin
987
On differential equations with unbounded operators in Hilbert space
M. A. Krasnosel'skii, S. G. Krein, P. E. Sobolevskii
990
A theorem on the spectra of a perturbed differential operator
V. B. Lidskii
994
The use of the theory of continuous groups of transformations in investigating the solutions of ordinary differential equations
N. N. Molchanov
998
On the numerical solution of a boundary problem for a system of ordinary differential equations
V. K. Saul'ev
1002
On operators realizable in logical nets
B. A. Trakhtenbrot
1005
Operator-analytical functions of an independent variable
M. K. Fage
1008

ASTRONOMY
The polarization of radioemission from sun spots as observed on the 3,2 cm wave
N. L. Kaidanovskii, D. V. Korol'kov, N. S. Soboleva, S. E. Khaikin
1012

PHYSICS
Photoproduction of $\pi^0$-mesons on complex nuclei
A. S. Belousov, E. I. Tamm, E. V. Shitov
1017
Energy of ionization by electrons in germanium crystals
V. S. Vavilov, L. S. Smirnov, V. M. Patskevich
1020
On the theory of stationary strata in the positive column of the gas discharge
O. V. Prudkovskaya, M. F. Shirokov
1023
On the outline of absorption and luminescence bands in the spectra of complex molecules
B. I. Stepanov, L. P. Kazachenko
1027
A generalized problem on the stochastic motion of a particle
N. A. Chernikov
1030

GEOPHYSICS
Theoretical model of the cumulus
L. N. Gutman
1033

ELECTRICAL ENGINEERING
Multistage construction of non-blocking switching networks
A. D. Kharkevich
1043

CHEMISTRY
The action of hydrazine on the $\mathrm{N}$-acyl and $\mathrm{N}$-aminoacyl derivatives of diketopiperazines
L. N. Akimova
1047
The synthesis of polyorganosiloxanoaluminium oxanes and polyorganosiloxanotitanium oxanes
K. A. Andrianov, A. A. Zhdanov, N. A. Kurasheva, V. G. Dulova
1050
Properties of $\mathrm{O}$-peptides of $\beta$-hydroxyamino acids. The fermentative production of peptides from $\mathrm{O}$-peptides of $\beta$-hydroxyamino acids
M. M. Botvinik, S. M. Avaeva
1053
On the solubility polytherm of system $(\mathrm{CaCO}_3+\mathrm{MgSO}_4\rightleftarrows\mathrm{CaSO}_4+\mathrm{MgCO}_3)-\mathrm{H}_2\mathrm{O}$
O. K. Yanat'eva
1056
The synthesis of trans-$\Delta^{4,9}$-steradienone-$3$
G. S. Grinenko, V. I. Maksimov
1059
Alkylation of cycloparaffins
Yu. G. Mamedaliev, Z. A. Mamedova
1063
The action of magnesium bromvinyl on 6-methoxytetralone-1 and the enolic esters of dihydroresorcin and methyldlhydroresorcin. The production of intermediate products for a complete synthesis of steroid compounds
I. N. Nazarov, I. V. Torgov, G. P. Verkholetova
1067
Production of xylenes by alkylation and dealkylation of aromatic hydrocarbons in the presence of synthetic aluminium silicates
A. V. Topchiev, G. M. Mamedaliev, A. N. Kislinskii, G. N. Anikina
1071

PHYSICAL CHEMISTRY
An investigation of the mechanism underlying the production of divinyl according to S. V. Lebedev with the use of radioactive carbon
O. M. Vinogradova, N. P. Keier, S. Z. Roginskii
1075

Поправки к статье “Изотопный эффект в равновесии жидкость–пар бинарных систем, содержащих дейтеросоединения” (ДАН, т. 110, № 2, 1956 г.)
I. B. Rabinovich, P. N. Nikolaev, Z. È. Gochaliev, N. N. Tret'yakova
Поправки к статье “Об одном классе автоколебательных систем” (ДАН, т. 110, № 2, 1956 г.)
I. M. Volk
Поправки к статье “О скорости сорбции стрептомицина карбоксильными катионитами” (ДАН, т. 111, № 2, 1956 г.)
L. F. Yakhontova, E. M. Savitskaya, B. P. Bruns
 
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