1. Smooth equivalence of germs of vector fields with a single zero eigenvalue or a pair of purely imaginary eigenvalues

   • G. R. Belitskii

   OriginalPaper Pages: 253 - 259

2. Geodesic flows on the two-dimensional torus and phase transitions “commensurability-noncommensurability”

   • M. L. Byalyi
   • L. V. Polterovich

   OriginalPaper Pages: 260 - 266

3. Quasiresonances in the problem of forced vibrations of a thin elastic shell interacting with a liquid

   • D. G. Vasil'ev
   • V. B. Lidskii

   OriginalPaper Pages: 267 - 276

4. Dilatation and the asymptotics of the eigenvalues of spectral problems with singularities

   • V. Ya. Ivrii
   • S. I. Fedorova

   OriginalPaper Pages: 277 - 281

5. Hamiltonian structure of the Kadomtsev-Petviashvili-II equation in the class of decreasing Cauchy data

   • V. D. Lipovskii

   OriginalPaper Pages: 282 - 291

6. Unitary representations of the group SO_o(∞, ∞) as limits of unitary representations of the groups SO_o(n, ∞) as n → ∞

   • G. I. Ol'shanskii

   OriginalPaper Pages: 292 - 301

7. Contractibility of the full general linear group of thel ₂(A)

   • E. V. Troitskii

   OriginalPaper Pages: 301 - 307

8. Currents on Lie groups with nonholonomic connection and integrable nonhamiltonian systems

   • A. P. Veselov
   • L. E. Veselova

   Brief Communications Pages: 308 - 309

9. Integration on supermanifolds and Radon supertransformations

   • I. M. Gel'fand
   • V. V. Minakhin
   • V. N. Shander

   Brief Communications Pages: 310 - 312

10. A sufficient condition for the continuity of the spectrum of a discrete Schrödinger operator

    • A. Ya. Gordon

    Brief Communications Pages: 313 - 315

11. Elements of formal Lie theory and the Poincaré-Birkhoff-Witt theorem for generalized shift operators

    • D. I. Gurevich

    Brief Communications Pages: 315 - 317

12. A Problem of S. Banach (Problem 106 from the “Scottish Book”

    • V. M. Kadets

    Brief Communications Pages: 317 - 319

13. Finiteness of the discrete spectrum of the perturbed Wiener-Hopf operator

    • L. V. Kakabadze

    Brief Communications Pages: 319 - 321

14. Kähler geometry of the infinite-dimensional homogeneous manifold M = Diff₊(S¹)/Rot(S¹)

    • A. A. Kirillov
    • D. V. Yur'ev

    Brief Communications Pages: 322 - 324

15. Spectral properties of the Cauchy-Poisson problem and the local asymptotic behavior of waves

    • Yu. V. Kogan

    Brief Communications Pages: 324 - 326

16. Existence and uniqueness of local solutions of functional equations

    • L. P. Kuchko

    Brief Communications Pages: 326 - 327

17. Spectra of C²-algebras of pseudodifferential operators with multidimensional discontinuities in symbols

    • B. A. Plamenevskii
    • V. N. Senichkin

    Brief Communications Pages: 328 - 329

18. Connection between the rigid isotopy class of a fifth-order nonsingular curve in RP² and its disposition with respect to a line

    • G. M. Polotovskii

    Brief Communications Pages: 330 - 332

19. The Gel'fand-Dikii Lie Algebras and the Virasoro algebra

    • T. G. Khovanova

    Brief Communications Pages: 332 - 334

20. Integrable G-invariant Hamiltonian systems and homogeneous spaces with simple spectrum

    • M. L. Chumak

    Brief Communications Pages: 334 - 336

21. Separation of multiple points of spectrum in the reduction sp(2n) ↓ sp(2n — 2)

    • V. V. Shtepin

    Brief Communications Pages: 336 - 338