Vol. 18 No. 1 (2021)

Published: 2021-01-12

Mathematical logic, algebra and number theory

On variety N of normal valued m-groups

Alexey Zenkov, Olga Isaeva

54-60
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Effective Wadge hierarchy in computable quasi-Polish spaces

Victor Selivanov

121-135
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On almost omega-categoricity of weakly o-minimal theories

Aizhan Altayeva, Beibut Kulpeshov

247-254
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On the discriminant of a quadratic field with intermediate fractions of negative norm and the decomposability of its representing polynomial

Alexei Korobov, Oleg Korobov

319-331
- PDF (Русский)
On closure of configurations in freely generated projective planes

Nurlan Kogabaev

358-368
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Computable metrics above the standard real metric

Ruslan Kornev

377-392
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Independence and simplicity in Jonsson theories with abstract geometry

Aibat Yeshkeyev, Maira Kassymetova, Olga Ulbrikht

433-455
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Weak reducibility of computable and generalized computable numberings

Zlata Ivanova, Marat Faizrahmanov

112-120
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Groups of central units of rank 1 of integral group rings of Frobenius metacyclic groups

Ekaterina Shumakova

622-639
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Computational mathematics

On the convergence of difference schemes for a third-order pseudoparabolic equation with nonlocal condition On the convergence of difference schemes

Александр Казбекович Баззаев
Detection of the corner structures in 3D arrays using scalable masks

Ivan Kazantsev, Bigul Mukhametzhanova, Kazizat Iskakov

61-71
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Recovery of a vector field in the cylinder by its jointly known NMR images and ray transforms

Evgeny Derevtsov, Svetlana Maltseva

86-103
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Dual null field method for Dirichlet problems of Laplace's equation in circular domains with circular holes

Ming-Gong Lee, Li-Ping Zhang, Zi-Cai Li, Alexander Kazakov

393-422
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Numerical solution of the solute transfer problem in porous elastic clay shale

Bunyod Imomnazarov, Aleksander Mikhailov, Ilkhom Khaydarov, Abdulkhamid Kholmurodov

694-702
- PDF (Русский)
Cubature formulas on the sphere that are invariant under the transformations of the dihedral groups of rotations with inversion

Anatolii Popov

703-709
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Discrete mathematics and mathematical cybernetics

Inverse problems of graph theory: graphs without triangles

Ivan Belousov, Dmitrii Paduchikh, Alexandr Alexandr Makhnev

27-42
- PDF (Русский)
On radius and typical properties of n-vertex graphs of given diameter

Tatiana Fedoryaeva

345-357
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All tight descriptions of major 3-paths in 3-polytopes without 3-vertices

Tsyndyma Batueva, Oleg Borodin, Dmitrii Nikiforov, Anna Ivanova

456-463
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Center and its spectrum of almost all n-vertex graphs of given diameter

Tatiana Fedoryaeva

511-529
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New perfect colorings of infinite circulant graphs with continuous sets of distances

Valeria Valeria Dmitrievna Plaksina, Polina Shcherbina

530-533
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Connections between quaternary and Boolean bent functions

Natalia Tokareva, Alexander Shaporenko, Patrick Sole

561-578
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Fixed points of cyclic groups acting purely harmonically on a graph

Aleksandr Mednykh

617-621
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On a metric property of perfect colorings

Anna Taranenko

640-646
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Differential equations, dynamical systems and optimal control

Kolmogorov differential systems with prescribed algebraic limit cycles

Rima Chouader, Salah Benyoucef, Ahmed Bendjeddou

1-8
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Initial-boundary value problems for degenerate hyperbolic equations

Alexandr Kozhanov

43-53
- PDF (Русский)
Analogues of the Cauchy-Goursat problem for a loaded third-order hyperbolic type equation in an infinite three-dimensional domain

Bozor Islomov, Yolqin Alikulov

72-85
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On the regular solvability of some classes of transmission problems in a cylindrical space domain

Vladimir Belonogov, Sergey Pyatkov

176-206
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On the shape of the free-surface problem of an ideal incompressible fluid flow with a singular sink at the top of a triangular ledge at the bottom

Anastasiia Titova

207-236
- PDF (Русский)
A frictional contact problem with damage in viscoplasticity

Abderrezak Kasri

255-281
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Multiscale analysis of a model problem of a thermoelastic body with thin inclusions

Sergey Sergey Alexandrovich Sazhenkov, Irina Fankina, Alexey Furtsev, Pavel Gilev, Arseniy Gorynin, Olga Gorynina, Vyacheslav Karnaev, Evelina Leonova

282-318
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On a nonlinear differential equation in a Banach space

Vasiliy Kachalov, Margarita Besova

332-337
- PDF (Русский)
On uniqueness and stability of a cycle in one gene network

Vladimir Golubyatnikov, Liliya Minushkina

464-473
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About convergence of difference schemes for a third-order pseudo-parabolic equation with nonlocal boundary value condition

Alexander Bazzaev, Dzerassa Gutnova

548-560
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Construction of exponentially decreasing estimates of solutions to a Cauchy problem for some nonlinear systems of delay differential equations

Nikolay Pertsev

579-598
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Boundary value problems with conjugation conditions for quasi-parabolic equations of the third order with a discontinuous sign-variable coefficient

Aleksandr Kozhanov , Natal'ya Shadrina

599-616
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Real, complex and functional analysis

Unique determination of conformal type for domains. III

Anatolii Kopylov

104-111
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Removable sets for Sobolev spaces with Muckenhoupt $A_1$-weight

Vladimir Shlyk

136-159
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Some remarks on Möbius structures

Vladislav Aseev

160-167
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Blaschke product in Privalov classes

Faizo Shamoyan, Vera Bednazh, Victoriya Kustova

168-175
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A note on Hardy type inequalities for quaternion-valued functions

M. Mustafa , D. Suragan

338-344
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Some remarks on rotation theorems for complex polynomials

Vladimir Dubinin

369-376
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A version of Schwarz's lemma for mappings with weighted bounded distortion

Maxim Tryamkin

423-432
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On band preserving orthogonally additive operators

Nariman Abasov

495-510
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Ergodic theorems in Banach ideals of compact operators

A. Azizov, V. Chilin

534-547
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Existence results for a class of nonlinear degenerate Navier problems

Albo Cavalheiro

647-667
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On the Orlicz cohomology of star-bounded simplicial complexes

Yaroslav Kopylov

710-719
- PDF (Русский)
On the transcendental solutions of Fermat type delay-differential and $c$-shift equations with some analogous results

Abhijit Banerjee, Tania Biswas

479-494
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Geometry and Topology

Three-dimensional homogeneous spaces of nonsolvable Lie groups with equiaffine connections of nonzero curvature

Natalya Mozhey

237-246
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Local $\tau$-density and local weak $\tau$-density in topological spaces

Tursun Yuldashev, Farkhod Mukhamadiev

474-478
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Probability theory and mathematical statistics

On the asymptotics of the distribution of the exit time beyond a non-increasing boundary for a compound renewal process

Alexander Sakhanenko, Vitali Wachtel, Evgeny Prokopenko, Anastasiya Shelepova

9-26
- PDF (Русский)
Feature selection based on statistical estimation of mutual information

Alexey Kozhevin

720-728
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SURVEYS

Partially commutative groups and Lie algebras

Evgeny Poroshenko, Evgeny Timoshenko

668-693
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