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JOURNALS // Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika // Archive

1990, Number 6


A Lie problem, projective groups of two-dimensional Riemann surfaces, and solitons
A. V. Aminova
3
Framing a class of tangentially degenerate surfaces
N. V. Amisheva
10
The basis property in a reflexive Fréchet space with a weakened topology
A. V. Bratishchev
13
Bands of finitely approximable and finitely separable semigroups
È. A. Golubov
17
A remark on Pólya peaks
A. A. Gol'dberg, I. M. Tkach
25
Boundary tangential values of a function of the Hardy classes $H^p_\omega$, $0<p<\infty$
Din' T'en Shon
27
Order optimality of the accuracy of some algorithms for solving ill-posed extremal problems
A. S. Leonov
30
Classification with respect to boundary value problems of a complete second-order equation in a Banach space
I. V. Mel'nikova, A. I. Filinkov
39
Operators with dense images and extensions of minimal systems
M. I. Ostrovskii, V. P. Fonf
45
Cartesian skeletons of congruence-distributive varieties
A. G. Pinus
47
Behavior of solutions of a first-order complex differential equation near a singular point
L. G. Prosenyuk, S. A. Yatsenko
51
Matroms of representations of the orthogonal group
A. V. Rozenblyum, L. V. Rozenblyum
55
On quotient groups of direct products of abelian groups
N. A. Serdyukova
62
On the modification of some of M. Araki's results
A. V. Stepanov
65
$L^2$-construction of distributions and a martingale problem
E. I. Trofimov
67
Height-two elements of the lattice of formations of finite groups
M. I. Èidinov
77

Brief communications
Lipschitzians, Lipschitz-affine spaces and the geometry of octaves
B. A. Rozenfel'd, T. A. Burtseva
81
Control of time-dependent dynamical objects with unknown dimension
B. V. Ulanov
83
Integral sets, estimates for solutions of integro-differential equations
Z. B. Tsalyuk
85


© Steklov Math. Inst. of RAS, 2026