1. Dear Victor Pavlovich!

   • Editorial board and editorial staff

   EditorialNotes 19 March 2021 Pages: 1 - 1

2. Localization and Spreading of Asymptotic Solutions of a Hyperbolic Equation with Variable Coefficients Describing Waves in a Channel of Variable Cross Section

   • A. I. Allilueva
   • A. I. Shafarevich

   Research Articles 19 March 2021 Pages: 2 - 7

   

3. On the Geometry of Slow-Fast Phase Spaces and the Semiclassical Quantization

   • M. Avendano-Camacho
   • N. Mamani-Alegria
   • Y. M. Vorobiev

   Research Articles 19 March 2021 Pages: 8 - 21

4. Canonical Operator on Punctured Lagrangian Manifolds

   • S. Yu. Dobrokhotov
   • V. E. Nazaikinskii
   • A. I. Schafarevich

   Research Articles 19 March 2021 Pages: 22 - 36

5. Liouville Foliations of Topological Billiards with Slipping

   • A. T. Fomenko
   • V. V. Vedyushkina
   • V. N. Zav’yalov

   Research Articles 19 March 2021 Pages: 37 - 55

   

6. V.P. Maslov’s Approach to the Analysis of Rank Distributions

   • M. A. Guzev
   • E. Yu. Nikitina
   • E. V. Chernysh

   Research Articles 19 March 2021 Pages: 56 - 65

   

7. Degenerate Zero-Truncated Poisson Random Variables

   • T. Kim
   • D. S. Kim

   Research Articles 19 March 2021 Pages: 66 - 72

8. On the Ergodic Theory of Equations of Mathematical Physics

   • V. V. Kozlov

   Research Articles 19 March 2021 Pages: 73 - 83

9. Weak Multi-Phase Asymptotics for Nonintegrable Equations

   • G. A. Omel’yanov

   Research Articles 19 March 2021 Pages: 84 - 95

10. Free Boundary Problem in a Polymer Solution Model

    • A. G. Petrova
    • V. V. Pukhnachev

    Research Articles 19 March 2021 Pages: 96 - 103

11. A Version of Lie Theorem for Divisible Solvable Groups

    • A. I. Shtern

    Research Articles 19 March 2021 Pages: 104 - 106

12. Dispersion Relationship and Spectrum in the Collisionless Plasma Kinetic Model

    • S. A. Stepin

    Research Articles 19 March 2021 Pages: 107 - 120

13. The Dirichlet–Neumann Operator for Oblique Water Waves over a Submerged Thin Cylinder and an Application

    • P. N. Zhevandrov
    • A. E. Merzon
    • M. I. Romero Rodriguez

    Research Articles 19 March 2021 Pages: 121 - 129

    

14. Maslov’s Magic Crystal

    • Yu. N. Zhuravlev

    Research Articles 19 March 2021 Pages: 130 - 135

15. Erratum to: Linear Widths of Weighted Sobolev Classes with Conditions on the Highest Order and Zero Derivatives

    • A. A. Vasil’eva

    Erratum 19 March 2021 Pages: 136 - 136