1. On Disjointly Homogeneous Orlicz–Lorentz Spaces

   • S. V. Astashkin
   • S. I. Strakhov

   Research Articles 15 December 2020 Pages: 631 - 642

2. On the Gradient Projection Method for Weakly Convex Functions on a Proximally Smooth Set

   • M. V. Balashov

   Research Articles 15 December 2020 Pages: 643 - 651

3. Riesz Potential with Integrable Density in Hölder-Variable Spaces

   • B. G. Vakulov
   • Yu. E. Drobotov

   Research Articles 15 December 2020 Pages: 652 - 660

4. Finite Groups with Formation Subnormal Normalizers of Sylow Subgroups

   • A. F. Vasil’ev
   • T. I. Vasil’eva
   • A. G. Koranchuk

   Research Articles 15 December 2020 Pages: 661 - 670

5. Collectives of Automata in Finitely Generated Groups

   • D. V. Gusev
   • I. A. Ivanov-Pogodaev
   • A. Ya. Kanel-Belov

   Research Articles 15 December 2020 Pages: 671 - 678

6. Comparison Method for Studying Equations in Metric Spaces

   • E. S. Zhukovskiy

   Research Articles 15 December 2020 Pages: 679 - 687

7. Extension of Functions from Isotropic Nikol’skii–Besov Spaces and Their Approximation together with Derivatives

   • S. N. Kudryavtsev

   Research Articles 15 December 2020 Pages: 688 - 696

8. Finite 3-Subgroups in the Cremona Group of Rank 3

   • A. A. Kuznetsova

   Research Articles 15 December 2020 Pages: 697 - 715

9. Lyapunov Functions, Krasnosel’skii Canonical Domains, and the Existence of Poisson Bounded Solutions

   • K. S. Lapin

   Research Articles 15 December 2020 Pages: 716 - 720

10. An Algorithm for Recognizing the Spherical Transitivity of an Initial Binary Automaton

    • T. I. Lipina

    Research Articles 15 December 2020 Pages: 721 - 726

11. Elliptic Differential-Difference Equations in the Half-Space

    • A. B. Muravnik

    Research Articles 15 December 2020 Pages: 727 - 732

12. Local Approximation by Parabolic Splines in the Mean for Large Averaging Intervals

    • V. T. Shevaldin

    Research Articles 15 December 2020 Pages: 733 - 742

13. Remarks on the Uniform and Absolute Convergence of Orthogonal Series

    • B. S. Kashin

    Short Communications 15 December 2020 Pages: 743 - 747

14. Hashing to Elliptic Curves of \(j=0\) and Mordell–Weil Groups

    • D. Koshelev

    Short Communications 15 December 2020 Pages: 748 - 751

15. Dynamics of Supports of Extremal Measures in the Field of a Point Charge

    • M. A. Lapik

    Short Communications 15 December 2020 Pages: 752 - 755

16. General Solution of a Cauchy–Riemann-Type Equation with Power-Law Singularities in Lower-Order Coefficients

    • A. B. Rasulov

    Short Communications 15 December 2020 Pages: 756 - 760

17. Conjugate Points in the Generalized Dido Problem

    • Yu. L. Sachkov

    Short Communications 15 December 2020 Pages: 761 - 763

18. Elementary Theory of the Alexander–Conway Polynomial

    • A. B. Sossinsky

    Short Communications 15 December 2020 Pages: 764 - 766

19. On Locally Finite Skew Group Algebras

    • Hai Bui Xuan
    • Nam Cao Minh
    • Bien Mai Hoang

    Research Articles 15 December 2020 Pages: 769 - 774

20. Estimates of the Values of \(n\)-Widths of Classes of Analytic Functions in the Weight Spaces \(H_{2,\gamma}(D)\)

    • S. B. Vakarchuk

    Research Articles 15 December 2020 Pages: 775 - 790

21. Inequalities for Positive Definite Functions

    • V. P. Zastavnyi

    Research Articles 15 December 2020 Pages: 791 - 801

22. Preservation of the Existence of Zeros in a Family of Set-Valued Functionals and Some Consequences

    • Yu. N. Zakharyan
    • T. N. Fomenko

    Research Articles 15 December 2020 Pages: 802 - 813

23. On Weyl-type Solutions of Differential Systems with a Singularity. The Case of Discontinuous Potential

    • M. Yu. Ignatiev

    Research Articles 15 December 2020 Pages: 814 - 826

24. Additive Properties of Slowly Increasing Convex Sets

    • K. I. Olmezov

    Research Articles 15 December 2020 Pages: 827 - 841

25. On Potential Functions Associated with Eigenfunctions of the Discrete Sturm–Liouville Operator

    • B. P. Osilenker

    Research Articles 15 December 2020 Pages: 842 - 853

26. Mean Convergence of Periodic Pseudotrajectories and Invariant Measures of Dynamical Systems

    • G. S. Osipenko

    Research Articles 15 December 2020 Pages: 854 - 866

27. Coadjoint Orbits and Time-Optimal Problems for Step-\(2\) Free Nilpotent Lie Groups

    • Yu. L. Sachkov

    Research Articles 15 December 2020 Pages: 867 - 876

    

28. Nonexistence of Global Weak Solutions for Evolution Equations with Fractional Laplacian

    • A. Z. Fino
    • E. I. Galakhov
    • O. A. Salieva

    Research Articles 15 December 2020 Pages: 877 - 883

29. Schur’s Criterion for Formal Newton Series

    • V. I. Buslaev

    Short Communications 15 December 2020 Pages: 884 - 888

30. On the Analytic and Geometric Properties of Mappings in the Theory of \(\mathscr Q_{q,p}\)-Homeomorphisms

    • S. K. Vodop’yanov

    Short Communications 15 December 2020 Pages: 889 - 894

31. A Metric Characteristic of Minimal Surfaces on Arbitrary Carnot Groups

    • M. B. Karmanova

    Short Communications 15 December 2020 Pages: 895 - 900

32. Local Dynamics of Chains of Van der Pol Coupled Systems

    • S. A. Kashchenko

    Short Communications 15 December 2020 Pages: 901 - 905

33. On the Hierarchical Behavior of Solutions of the Maryland Equation in the Semiclassical Approximation

    • F. Klopp
    • A. A. Fedotov

    Short Communications 15 December 2020 Pages: 906 - 910

    

34. Exact Dynamics of Moments and Correlation Functions for GKSL Fermionic Equations of Poisson Type

    • Iu. A. Nosal’
    • A. E. Teretenkov

    Short Communications 15 December 2020 Pages: 911 - 915

35. Non-Abelian Groups Acting on Severi–Brauer Surfaces

    • K. A. Shramov

    Short Communications 15 December 2020 Pages: 916 - 917