1. An Approach to the Solution of the Initial Boundary-Value Problem for Systems of Fourth-Order Hyperbolic Equations

   • A. T. Assanova
   • Zh. S. Tokmurzin

   Research Articles 03 August 2020 Pages: 3 - 14

2. Lie Algebras of Heat Operators in a Nonholonomic Frame

   • V. M. Buchstaber
   • E. Yu. Bunkova

   Research Articles 03 August 2020 Pages: 15 - 28

3. Weak Asymptotics Method Approach to the Problem of \(\delta\)-Shock Wave Interactions

   • V. G. Danilov

   Research Articles 03 August 2020 Pages: 29 - 38

   

4. \(\mathrm P=\mathrm W\) Phenomena

   • L. Katzarkov
   • V. V. Przyjalkowski
   • A. Harder

   Research Articles 03 August 2020 Pages: 39 - 49

5. Andronov–Hopf Bifurcation in Logistic Delay Equations with Diffusion and Rapidly Oscillating Coefficients

   • S. A. Kashchenko
   • D. O. Loginov

   Research Articles 03 August 2020 Pages: 50 - 63

   

6. Variational Inequalities and Analogs of the Hopf Theorems

   • V. S. Klimov

   Research Articles 03 August 2020 Pages: 64 - 76

7. Approximation of a Multivalued Solution of the Hamilton–Jacobi Equation

   • E. A. Kolpakova

   Research Articles 03 August 2020 Pages: 77 - 86

8. New Estimate for Kloosterman Sums with Primes

   • M. A. Korolev
   • M. E. Changa

   Research Articles 03 August 2020 Pages: 87 - 93

9. Lattice of Definability in the Order of Rational Numbers

   • An. A. Muchnik
   • A. L. Semenov

   Research Articles 03 August 2020 Pages: 94 - 107

   

10. On Hamiltonian Minimality of Isotropic Nonhomogeneous Tori in \(\mathbb{H}^n\) and \(\mathbb{C} \mathrm{P}^{2n+1}\)

    • M. A. Ovcharenko

    Research Articles 03 August 2020 Pages: 108 - 116

11. On the Question of Definability of Homogeneously Decomposable Torsion-Free Abelian Groups by Their Homomorphism Groups and Endomorphism Rings

    • T. A. Pushkova
    • A. M. Sebel’din

    Research Articles 03 August 2020 Pages: 117 - 122

12. Solvability of a Mixed Problem with Nonlinear Boundary Condition for a One-Dimensional Semilinear Wave Equation

    • S. S. Kharibegashvili
    • O. M. Jokhadze

    Research Articles 03 August 2020 Pages: 123 - 136

13. Decomposing a Matrix into Two Submatrices with Extremely Small Operator Norm

    • I. V. Limonova

    Short Communications 03 August 2020 Pages: 137 - 141

14. On Certain Automorphism Groups of Finitely Generated Groups

    • Sandeep Singh

    Short Communications 03 August 2020 Pages: 142 - 145

15. Normal Automorphisms of Free Groups of Infinitely Based Varieties

    • S. I. Adian
    • V. S. Atabekyan

    Research Articles 03 August 2020 Pages: 149 - 154

16. Radiation Conditions for the Magnetic Helmholtz Equation

    • A. R. Aliev
    • Sh. Sh. Rajabov

    Research Articles 03 August 2020 Pages: 155 - 161

17. On Changes of Variable Preserving the Convergence and Absolute Convergence of Fourier Series in the Haar Wavelet System

    • K. R. Bitsadze

    Research Articles 03 August 2020 Pages: 162 - 170

18. On Dominated Extension of Linear Operators

    • A. A. Gelieva
    • Z. A. Kusraeva

    Research Articles 03 August 2020 Pages: 171 - 178

19. Nonlinear Triple Product \(A^{*}B + B^{*}A\) for Derivations on \(\ast\)-Algebras

    • Vahid Darvish
    • Mojtaba Nouri
    • Mehran Razeghi

    Research Articles 03 August 2020 Pages: 179 - 187

20. 2-Colorings of Hypergraphs with Large Girth

    • Yu. A. Demidovich

    Research Articles 03 August 2020 Pages: 188 - 200

21. Finite Groups with \(\mathfrak F\)-Subnormal Subgroups

    • M. N. Konovalova

    Research Articles 03 August 2020 Pages: 201 - 208

22. Completely Decomposable Quotient Divisible Abelian Groups with Isomorphic Endomorphism Semigroups

    • O. V. Lyubimtsev

    Research Articles 03 August 2020 Pages: 209 - 218

23. Asymptotic Expansions at Nonsymmetric Cuspidal Points

    • I. Ly
    • N. Tarkhanov

    Research Articles 03 August 2020 Pages: 219 - 228

24. On the Fourier–Walsh Transform of Functions from Dyadic Dini–Lipschitz Classes on the Semiaxis

    • S. S. Platonov

    Research Articles 03 August 2020 Pages: 229 - 242

25. A Banach Lattice Having the Approximation Property, but not Having the Bounded Approximation Property

    • O. I. Reinov

    Research Articles 03 August 2020 Pages: 243 - 249

26. Homogenization Estimates of Nondivergence Elliptic Operators of Second Order

    • M. M. Sirazhudinov

    Research Articles 03 August 2020 Pages: 250 - 271

27. A Factorization Problem on a Smooth Two-Dimensional Surface

    • A. P. Soldatov

    Research Articles 03 August 2020 Pages: 272 - 276

28. Invertibility of Multidimensional Integral Operators with Bihomogeneous Kernels

    • O. G. Avsyankin

    Short Communications 03 August 2020 Pages: 277 - 281

29. Universal Fourier Series

    • M. G. Grigoryan

    Short Communications 03 August 2020 Pages: 282 - 285

30. On an Initialization Problem

    • A. G. Eliseev
    • T. A. Ratnikova
    • D. A. Shaposhnikova

    Short Communications 03 August 2020 Pages: 286 - 291

31. Geodesic Maps “in the Large” of Ricci-Flat Spaces with \(n\) Complete Geodesic Lines

    • J. Mikeš
    • I. Hinterleitner
    • N. I. Guseva

    Short Communications 03 August 2020 Pages: 292 - 296

32. Modulus Estimates on Abstract Surfaces over a Domain of Revolution and a Cylindrical Ring

    • M. V. Tryamkin

    Short Communications 03 August 2020 Pages: 297 - 301

33. Unique Continuation of Solutions of Second-Order Quasi-Elliptic Equations

    • N. A. Shananin

    Short Communications 03 August 2020 Pages: 302 - 306