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1989, Volume 306, Number 3  


MATHEMATICS
Estimates for coefficients of bounded univalent functions with rotational symmetry
I. A. Aleksandrov
521–524
Classification of del Pezzo surfaces with log-terminal singularities of index $\le 2$, and involutions on K3 surfaces
V. A. Alexeev, V. V. Nikulin
525–528
Asymptotics of the logarithm of the number of Boolean threshold functions
Yu. A. Zuev
528–530
Construction of quasivalues for weakly well-posed problems
V. K. Ivanov, I. V. Mel'nikova
530–535
Existence of stable initial manifolds for systems of nonlinear functional-differential equations
N. B. Konyukhova
535–540
Spectral problems for a system of ordinary differential equations that is not normal
Yu. A. Mamedov
540–544
Exactness of Novikov-type inequalities for the case $\pi_1M=\mathbf{Z}^m$ and for Morse forms whose cohomology classes are in general position
A. V. Pajitnov
544–548
A fast on-line code
B. Ya. Ryabko
548–552
Lattices in algebraic number fields
M. M. Skriganov
553–555

CYBERNETICS AND THE REGULATION THEORY
Observers and differentiators of the output of nonlinear systems
S. V. Emel'yanov, S. K. Korovin, S. V. Nikitin, M. G. Nikitina
556–560

AERODYNAMICS
Exact solution of the von Kármán–Fal'kovich equation that describes the separation from the corner point of a profile
V. N. Diesperov
561–565

FLUID MECHANICS
Intrinsic mass of a singular vortex pair
S. T. Belyaev, Yu. K. Krasnov
566–570
Modeling of heat transfer in turbulent flow regimes of a viscous incompressible liquid in a flat channel
S. G. Ponomarev, V. G. Priymak, B. L. Rozhdestvenskii
570–574

GEOPHYSICS
Reconstruction of ionospheric heterogeneities using the radio sounding
V. E. Kunitsyn, N. G. Preobrazhenskii, E. D. Tereshchenko
575–579

PHYSICS
Parametric free-electron laser based on the microtron
V. I. Alekseev, E. V. Alieva, K. A. Belovintsev, E. G. Bessonov, A. V. Serov, P. A. Cherenkov
580–583
Josephson effect in the semiconductor–superconductor-type eutectic alloy
M. I. Aliev, G. I. Isakov, F. Yu. Aliev, A. T. Eminzade
583–586
Boundary conditions for existence of “absolute black body”
V. I. Il'ichev, I. B. Bessonov, B. I. Bessonov, N. E. Khorosheva, L. I. Menshutkina
587–590
Description of the homogeneous nucleation kinetics based on the concept of quasiparticles
L. V. Malyukova, A. Ya. Babenko
590–597
Polariton theory of resonant Raman scattering in direct band gap cubic semiconductors (scattering by phonons
Nguyen van Hieu, Nguyen Hong Quang, Nguyen ai Viet
597–600
The problem of space-time parameters of quarks adronization?
S. I. Nikol'skii, A. P. Chubenko
601–603

CRYSTALLOGRAPHY
Crystal structure of a new $\mathrm{ZnIn}_2\mathrm{S}_4\mathrm{(VI)_a}$ polytype
A. V. Biyushkina, F. G. Donika, S. I. Radautsan
617–619
The $3\mathring{\mathrm{A}}$ resolution X-ray study of Micrococcus Lysodeikticus bacterium catalase
R. R. Melik-Adamyan, A. I. Grebenko, V. V. Barynin, E. F. Yusifov, A. A. Vagin, G. N. Murshudov, S. V. Rubinskii, B. K. Vaĭnshteĭn
620–623
Atomic structure $\mathrm{Bi}_{25}\mathrm{CaO}_{39}$ and the interpretation of selenite-type crystal structure
S. F. Radaev, L. A. Muradyan, Yu. F. Kargin, V. A. Sarin, E. È. Rider, V. I. Simonov
624–627
 
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