Categories of Symmetry Groups of the Space of Solutions of the Special Doubly Confluent Heun Equation V. M. BuchstaberS. I. Tertychnyi Research Articles 14 December 2021 Pages: 643 - 654
On the Distributivity and Modularity Properties of the Lattice of Fitting Classes N. T. Vorob’evE. D. Lantsetova Research Articles 14 December 2021 Pages: 655 - 665
A Bilogarithmic Criterion for the Existence of a Regular Minorant that Does Not Satisfy the Bang Condition R. A. Gaisin Research Articles 14 December 2021 Pages: 666 - 678
On the Representation of Integers as Sums of a Class of Triangular Numbers Jing-Jun Yu Research Articles 14 December 2021 Pages: 679 - 686
Asymptotics of the Solution of a Variational Problem on a Large Interval L. A. Kalyakin Research Articles 14 December 2021 Pages: 687 - 699
Inversions of Hölder’s Inequality I. D. KanV. A. Odnorob Research Articles 14 December 2021 Pages: 700 - 708
Dynamics of Spatially Distributed Chains of Coupled Systems of Equations in a Two-Dimensional Domain S. A. Kashchenko Research Articles 14 December 2021 Pages: 709 - 717
Regularity of Continuous Multilinear Operators and Homogeneous Polynomials Z. A. Kusraeva Research Articles 14 December 2021 Pages: 718 - 725
Cutting Polygons Composed of Equal Rectangles into Similar Rectangles I. V. Novikov Research Articles 14 December 2021 Pages: 726 - 731
Automorphisms of Surfaces of Markov Type A. Yu. Perepechko Research Articles 14 December 2021 Pages: 732 - 737
Hugoniot–Maslov Chain for Shock Waves in Buckley–Leverett Equations P. Rodríguez-BermúdezF. V. SousaB. Valiño-Alonso Research Articles 14 December 2021 Pages: 738 - 753
The Moutard Transformation for the Davey–Stewartson II Equation and Its Geometrical Meaning I. A. Taimanov Research Articles 14 December 2021 Pages: 754 - 766
On Fourier Series on the Torus and Fourier Transforms R. M. Trigub Research Articles 14 December 2021 Pages: 767 - 772
Uniform Convexity in Nonsymmetric Spaces I. G. Tsar’kov Research Articles 14 December 2021 Pages: 773 - 783
On Multipoint Padé Approximants whose Poles Accumulate on Contours that Separate the Plane M. L. Yattselev Research Articles 14 December 2021 Pages: 784 - 795
Weierstrass Functions Separate All Traces M. GoffengA. S. Usachev Short Communications 14 December 2021 Pages: 796 - 798
Yudin–Hermite Extremal Problems for Polynomials V. I. Ivanov Short Communications 14 December 2021 Pages: 799 - 805
Regular Spectral Problems of Hyperbolic Type for a System of First-Order Ordinary Differential Equations A. A. Shkalikov Short Communications 14 December 2021 Pages: 806 - 810
Almost Binarity of Countably Categorical Weakly Circularly Minimal Structures A. B. AltayevaB. Sh. Kulpeshov Research Articles 14 December 2021 Pages: 813 - 829
Existence Results for Nonlinear Elliptic Equations with Leray–Lions Operators in Sobolev Spaces with Variable Exponents M. Mosa Al-ShomraniM. Ben Mohamed SalahK. Kefi Research Articles 14 December 2021 Pages: 830 - 841
Inverse Problem for Finding the Order of the Fractional Derivative in the Wave Equation R. R. AshurovYu. É. Faiziev Research Articles 14 December 2021 Pages: 842 - 852
Asymptotics of the Riemann–Hilbert Problem for the Somov Model of Magnetic Reconnection of Long Shock Waves S. I. BezrodnykhV. I. Vlasov Research Articles 14 December 2021 Pages: 853 - 871
Automorphisms of Nonnormal Toric Varieties I. A. BoldyrevS. A. Gaifullin Research Articles 14 December 2021 Pages: 872 - 886
Theories of the Classical Propositional Logic and Substitutions I. A. Gorbunov Research Articles 14 December 2021 Pages: 887 - 893
Asymptotics of Sums of Cosine Series with Fractional Monotonicity Coefficients M. I. D’yachenko Research Articles 14 December 2021 Pages: 894 - 902
Chebyshev’s Problem of the Moments of Nonnegative Polynomials V. I. Ivanov Research Articles 14 December 2021 Pages: 903 - 915
The Cocompleteness of the Category \(\mathbf{Tych}^G\) E. V. Mart’yanov Research Articles 14 December 2021 Pages: 916 - 921
On Unstable Solutions with a Nonmonotone Boundary Layer in a Two-Dimensional Reaction-Diffusion Problem N. N. NefedovE. I. Nikulin Research Articles 14 December 2021 Pages: 922 - 931
Precompact Sets in Bochner–Lebesgue Spaces with Variable Exponent J. Xu Research Articles 14 December 2021 Pages: 932 - 941
A Note on the Classical Implicit Function Theorem E. R. AvakovG. G. Magaril-Il’yaev Short Communications 14 December 2021 Pages: 942 - 946
Approximatively Compact Sets in Asymmetric Efimov–Stechkin Spaces and Convexity of Almost Suns A. R. AlimovI. G. Tsar’kov Short Communications 14 December 2021 Pages: 947 - 951
The Kantorovich Problem with a Parameter and Density Constraints V. I. BogachevA. N. DoledenokI. I. Malofeev Short Communications 14 December 2021 Pages: 952 - 955
Crossing of the Critical Energy Level in Hamiltonian Systems with Slow Dependence on Time S. V. Bolotin Short Communications 14 December 2021 Pages: 956 - 959
On the Discreteness of the Spectrum of Matrix Schrödinger and Dirac Operators with Point Interactions V. S. BudykaM. M. Malamud Short Communications 14 December 2021 Pages: 960 - 966
Spectral Asymptotics of Solutions of a \(2\times 2\) System of First-Order Ordinary Differential Equations A. P. KosarevA. A. Shkalikov Short Communications 14 December 2021 Pages: 967 - 971
Variational Formulation of the Problem of Finding Generalized Solutions for Quasilinear Hyperbolic Systems of Conservation Laws Yu. G. Rykov Short Communications 14 December 2021 Pages: 972 - 975
Almost Sharp Descriptions of Traces of Sobolev Spaces on Compacta A. I. Tyulenev Short Communications 14 December 2021 Pages: 976 - 980
A Solution to a Problem on the Spectra of Sign Pattern Matrices Ya. N. Shitov Short Communications 14 December 2021 Pages: 981 - 981
