1. Force Evolutionary Billiards and Billiard Equivalence of the Euler and Lagrange Cases

   • V. V. Vedyushkina
   • A. T. Fomenko

   MATHEMATICS Open access 04 March 2021 Pages: 1 - 4

   

2. On Oscillation Properties of Self-Adjoint Boundary Value Problems of Fourth Order

   • A. A. Vladimirov
   • A. A. Shkalikov

   MATHEMATICS Open access 04 March 2021 Pages: 5 - 9

3. Spectral Analysis and Solvability of Volterra Integro-Differential Equations

   • V. V. Vlasov
   • N. A. Rautian

   MATHEMATICS 04 May 2021 Pages: 10 - 13

4. Continuous Mean Periodic Extension of Functions from an Interval

   • V. V. Volchkov
   • Vit. V. Volchkov

   MATHEMATICS 04 May 2021 Pages: 14 - 18

5. Asymptotics of Eigenvalues in the Orr–Sommerfeld Problem for Low Velocities of Unperturbed Flow

   • D. V. Georgievskii

   MATHEMATICS 04 May 2021 Pages: 19 - 22

6. On the Existence and Structure of Universal Functions

   • M. G. Grigoryan

   MATHEMATICS 04 May 2021 Pages: 23 - 25

7. Application of a Numerical-Asymptotic Approach to the Problem of Restoring the Parameters of a Local Stationary Source of Anthropogenic Pollution

   • M. A. Davydova
   • N. F. Elansky
   • O. V. Postylyakov

   MATHEMATICS 04 May 2021 Pages: 26 - 31

   

8. On Stabilization of the Poisson Integral and Tikhonov–Stieltjes Means: Two-Sided Estimate

   • V. N. Denisov

   MATHEMATICS 04 May 2021 Pages: 32 - 34

9. Analogues of Classical Goodness-of-Fit Tests for Distribution Tails

   • E. O. Kantonistova
   • I. V. Rodionov

   MATHEMATICS 04 May 2021 Pages: 35 - 38

10. Linear System of Differential Equations with a Quadratic Invariant as the Schrödinger Equation

    • V. V. Kozlov

    MATHEMATICS Open access 04 March 2021 Pages: 39 - 43

11. Problem of Determining the Anisotropic Conductivity in Electrodynamic Equations

    • V. G. Romanov

    MATHEMATICS Open access 04 March 2021 Pages: 44 - 46

12. Equiconvergence of Spectral Decompositions for Sturm–Liouville Operators with a Distributional Potential in Scales of Spaces

    • A. M. Savchuk
    • I. V. Sadovnichaya

    MATHEMATICS 04 May 2021 Pages: 47 - 49

13. Uniqueness and Existence Theorems for Solving Problems of Scattering Electromagnetic Waves by Anisotropic Bodies

    • A. B. Samokhin
    • Yu. G. Smirnov

    MATHEMATICS 04 May 2021 Pages: 50 - 53

14. Isometries on Noncommutative Symmetric Spaces

    • F. A. Sukochev
    • J. Huang

    MATHEMATICS 04 May 2021 Pages: 54 - 56

15. On Global Solvability of Nonlinear Equations with Parameters

    • A. V. Arutyunov
    • S. E. Zhukovskiy

    CONTROL THEORY Open access 04 March 2021 Pages: 57 - 60

16. Sub-Riemannian (2, 3, 5, 6)-Structures

    • Yu. L. Sachkov
    • E. F. Sachkova

    CONTROL THEORY Open access 04 March 2021 Pages: 61 - 65

17. Erratum to: Zero Preservation for a Family of Multivalued Functionals, and Applications to the Theory of Fixed Points and Coincidences

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

    Erratum 04 May 2021 Pages: 66 - 66

18. Erratum to: Abductive Reasoning in Explanation Problems of an Observed Effect

    • S. N. Vassilyev

    Erratum 04 May 2021 Pages: 67 - 67