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JOURNALS
// Matematicheskie Zametki
// Archive
1990, Volume 48, Issue 3
Carathéodory theorem for matrix-valued functions and the maximal jump of spectral functions in extension problems
D. Z. Arov
3
Surfaces with maximal curvature of the Grassmann image
A. A. Borisenko, Yu. A. Nikolaevskii
12
System, similar to a normal form
A. D. Bruno
20
Breakdown of uniqueness of solutions of the Dirichlet problem for elliptic systems in a disc
V. P. Burskii
32
Approximations of differentiable functions of several variables
S. B. Vakarchuk
37
Behavior of the sum of a series of exponentials near the boundary of the domain of regularity
A. M. Gaisin
45
Representation of the approximational error term and sharp estimates for some local splines
V. A. Zheludev
54
Domination-complete graphs
V. È. Zverovich
66
Remarks on the superposition measurability of a multivalued function
V. Zigmunt
70
Categorical properties of the set of nonuniqueness points in the space
$L_\varphi$
D. G. Kamuntavichius
73
Inverse problem of the determination of a nonlinear dependence of the electric current on the electric field intensity
O. A. Klimenko
81
Exact solutions of some approximation problems by means of positive operators
G. G. Magaril-Il'yaev
91
Several new results on quasicrystallographic groups in Novikov sense
S. A. Piunikhin
100
Constructive formalization of the Tennenbaum theorem and its applications
V. E. Plisko
108
A propositional logic of Boolean recursive programs in which predicate variables appear in conditions
A. L. Rastsvetaev
119
The origin of vortices in an ideal fluid
Kh. M. Sunnatov
128
A quasiinvariant smooth measure on the diffeomorphism group of a domain
M. U. Khafizov
134
Brief Communications
Finite-gap solutions of the equation of cylindrical-symmetric Heisenberg magnetics
D. A. Korotkin
143
Criteria for
$M$
-ideals of compact operators
È. F. Oja
145
Holomorphicity of
$CR$
-mappings into a space of large dimension
A. Yu. Pushnikov
147
Decomposition of the regular representation of a finite group with two generators
S. P. Strunkov
149
Some theorems of Phragmén–Lindelöf type for solutions of semilinear parabolic inequalities
M. Kh. Khallaev
151
Contact symmetries and conservation laws of some equations in gas dynamics
V. E. Shemarulin
154
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Steklov Math. Inst. of RAS
, 2025