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MATHEMATICS
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Extremal elements and the value of the best approximation of a monotone function on $R^n$ by sums of functions of fewer variables
M.-B. A. Babaev
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11–13 |
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On the Cauchy problem for a class of nonlinear first-order partial differential equations
A. V. Bitsadze
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14–16 |
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On the diffraction of internal waves by the edge of an ice field
S. A. Gabov, A. G. Sveshnikov
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16–20 |
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Equivalent norms on nonreflexive Banach spaces
B. V. Godun
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20–23 |
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On the complexity of approximate assignment of functions in the algebra of logic
R. M. Dzhavadov
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24–27 |
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Some qualitative properties of the solutions of a mixed problem for elliptic equations in nonsmooth domains
A. I. Ibragimov
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27–31 |
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The projection theorem and its application to nonhomogeneous boundary-value problems
N. V. Kislov
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31–34 |
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Boundary properties of equimorphic functions
J. E. Mejía
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35–38 |
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Rational trigonometric sums and Artin $L$-functions
S. A. Stepanov
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39–42 |
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Regular subgraphs of regular graphs
V. A. Tashkinov
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43–44 |
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Mixed problems for parabolic equations of variable order
N. J. Yurchuk
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44–47 |
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GEOPHYSICS
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A dynamic model of the formation of Earth upper mantle seismic anisotropy
A. G. Bugaevskii, E. M. Chesnokov
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48–52 |
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On the effects of dissipation and absorption of longitudinal seismic waves in the earth crust
M. V. Nevsky, A. V. Nikolaev, O. Yu. Riznichenko
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53–57 |
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MATHEMATICAL PHYSICS
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The solvability of a two-phase quasistationary problem of crystallization
E. V. Radkevich, A. S. Melikulov
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58–62 |
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CRYSTALLOGRAPHY
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Application of algebraic method for obtaining a basic system from the vector system
V. A. Lebedev, E. A. Soldatov, È. A. Kuz'min, N. V. Belov
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73–76 |
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Refinement of crystal structure of two $\mathrm{Mn}$-silicates $\mathrm{Na}_2\mathrm{Mn}_2\mathrm{Si}_2\mathrm{O}_7$ and
$\mathrm{Na}_5(\mathrm{Mn},\mathrm{Na})_3\mathrm{MnSi}_6\mathrm{O}_{18}$
L. P. Otroshchenko, V. I. Simonov, N. V. Belov
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76–79 |
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On a criterion of the belonging of a structure to homometric set
V. G. Rau, T. F. Rau, V. V. Ilyukhin, N. V. Belov
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80–83 |
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Crystal structure of a new $\mathrm{Na},\mathrm{Fe}^{3+}$-orthophosphate,
$(\mathrm{Fe}_{0{,}5}\square_{0{,}5})(\mathrm{H}_{1{,}5}\square_{0{,}5})\mathrm{Na}_5[\mathrm{PO}_4]_2\mathrm{Fe}_2
=\mathrm{Fe}_{0{,}5}^{3+}\mathrm{Na}_5[\mathrm{PO}_4]_2\mathrm{Fe}_{0{,}5}\cdot1{,}5\mathrm{HF}$
O. V. Yakubovich, E. N. Matvienko, M. A. Simonov, N. V. Belov
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83–88 |
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