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1989, Volume 309, Number 3  


MATHEMATICS
On the theory of Sturm–Liouville difference equations
A. T. Bulabaev, L. A. Shuster
521–524
Principal solutions and automorphism groups of systems of equations in terms
Yu. V. Gavrilenko
524–528
Second-order approximation for a nonsmooth function
V. F. Dem'yanov
529–532
The spectrum of small oscillations of a viscoelastic hereditary medium
A. I. Miloslavskii
532–536
Approximation by entire functions
F. G. Nasibov
536–540
A new approximate method for finding the one-dimensional distribution of a vector process defined by a stochastic differential equation
V. I. Sinitsyn
541–544
Representation of the solutions of second-order linear evolution superdifferential equations by path integrals
O. G. Smolyanov, E. T. Shavgulidze
545–550
Optimal coordinate functions in projection-difference methods, widths and lattice packings
N. A. Strelkov
550–554

CYBERNETICS AND THE REGULATION THEORY
A functional-dynamic model of technological innovation
B. L. Kuchin
555–558

MECHANICS
On the separation of energy from mass in inhomogeneous discrete mechanical systems
A. N. Golubyatnikov, S. I. Plotnikov
559–562
Solution of a contact problem with friction and adhesion
V. I. Mossakovskii, A. G. Biskup, L. V. Mossakovskaya
562–566

FLUID MECHANICS
Similarity in radiative gas dynamics
L. M. Biberman, S. Ya. Bronin
567–570

GEOPHYSICS
On the inversion of chemical composition of natural, gases in seismo-active regions of Kirghizia
A. U. Abdullaev
571–575
Seismovibrational excitation of geoelectric signals at combination frequencies
A. V. Guglielmi, A. N. Kamshilin, E. N. Volkova, E. B. Chirkov
575–578
Convection model of thermal field in the near-surface layer
V. P. Myasnikov, M. M. Ramazanov
578–582
Remote fragmentation of earth crust on the experimental area in Dagestan
S. S. Sardarov (jr.), V. V. Ratushnyi, N. M. Bulaeva
583–586
Activation logging on $\mathrm{O}$, $\mathrm{Si}$ and $\mathrm{Al}$ and the definition of fluid type in quartzite-feldspar reservoir
A. I. Khisamutdinov, E. B. Blankov
587–590

MATHEMATICAL PHYSICS
A new integrable model: two-dimensional gravity with dynamical torsion
M. O. Katanaev
591–593
Excitation and scattering of electromagnetic waves by bodies with different impedances that have symmetry of revolution
V. F. Kravchenko
594–598
Diffraction by a finite plane system of ideally conducting screens
A. A. Fomin
598–602

PHYSICS
High-conductivity state in oxidized polypropylene films
V. M. Arkhangorodskii, E. G. Guk, A. M. El'yashevich, A. N. Ionov, V. M. Tuchkevich, I. S. Shlimak
603–606
Self induced rotation of laser radiation polarization plane in resonance media
S. A. Bakhramov, A. T. Berdikulov, A. M. Kokhkharov, V. V. Tikhonenko, P. Kh. Khabibullaev
607–611
Self-switching in the two-core optical fibre
E. M. Dianov, A. V. Kuznetsov, A. A. Mayer, O. G. Okhotnikov, K. Yu. Sitarskiĭ, I. A. Shcherbakov
611–614
Some properties of relaxation kernels in systems with heredity
O. Yu. Dinariev
615–618
Effect of dispersion on the self-switching in systems with unidirectional coupled waves
A. A. Mayer, S. G. Karataev
619–622
 
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