1. Smoothness of solutions of second-order hyperbolic equations with discontinuous coefficients

   • V. N. Aref'ev

   OriginalPaper Pages: 557 - 563

2. Summation of multiple trigonometric Fourier series

   • R. R. Ashurov

   OriginalPaper Pages: 563 - 568

3. Properties of the spectral function of a Sturm-Liouville operator with discontinuous coefficients

   • A. B. Budak
   • V. N. Denisov

   OriginalPaper Pages: 568 - 574

4. Three-dimensional hyperbolic manifolds with general fundamental polyhedron

   • A. Yu. Vesnin

   OriginalPaper Pages: 575 - 577

5. Approximation of functions of class c(ε) by sequences of de la Vallée-Poussin sums

   • O. V. Davydov

   OriginalPaper Pages: 577 - 583

6. Multi-phase solutions of the Benjamin-Ono equation and their averaging

   • S. Yu. Dobrokhotov
   • I. M. Krichever

   OriginalPaper Pages: 583 - 594

7. C^r-Property and approximately differentiable functions

   • N. M. Isakov

   OriginalPaper Pages: 595 - 597

8. 1-Cohomologies of a special linear group with coefficients in a module of truncated polynomials

   • A. S. Kleshchev

   OriginalPaper Pages: 597 - 603

9. Approximations of compact sets of functions by piecewise polynomial surfaces in spaces of smooth functions

   • S. N. Kudryavtsev

   OriginalPaper Pages: 603 - 610

10. Estimates of the singular numbers of Hankel operators

    • O. G. Parfenov

    OriginalPaper Pages: 610 - 613

11. Functionally balanced groups

    • I. V. Protasov

    OriginalPaper Pages: 614 - 616

12. Periodic solutions of difference Runge-Kutta schemes

    • V. I. Rozhkov
    • A. M. Popov

    OriginalPaper Pages: 617 - 620

13. Connection between the mixing properties of a flow and the isomorphicity of the transformations that compose it

    • V. V. Ryzhikov

    OriginalPaper Pages: 621 - 627

14. Fourier-Maslov transform in the space of multivalued analytic functions

    • B. Yu. Sternin
    • V. E. Shatalov

    OriginalPaper Pages: 627 - 635

15. Properties of integral solutions of differential inclusions with m-accretive operators

    • A. L. Tolstonogov

    OriginalPaper Pages: 636 - 644

16. Best quadrature formulas for improper integrals on certain classes of differentiable functions

    • D. B. Bazarkhanov

    Brief Communications Pages: 645 - 647

17. A pseudo-euclidean representation of conditionally positive mappings

    • V. P. Belavkin

    Brief Communications Pages: 647 - 649

18. Nonrecursiveness of the integral of a conditionally periodic function

    • N. G. Moshchevitin

    Brief Communications Pages: 650 - 652

19. Integration of Hamiltonian systems on a separate isoenergetic surface

    • G. G. Okuneva

    Brief Communications Pages: 652 - 654

20. Optimal control by random sequences with constraints

    • A. B. Piunovskii
    • V. M. Khametov

    Brief Communications Pages: 654 - 656

21. C-Spectral sequence of evolution equations

    • N. G. Khor'kova

    Brief Communications Pages: 657 - 658

22. Letter to the editor

    • S. Yu. Orevkov

    Letter Pages: 659 - 659