1. Model algebras and representations of graphs

   • I. M. Gel'fand
   • V. A. Ponomarev

   OriginalPaper Pages: 157 - 166

2. Integration of nonlinear equations of mathematical physics by the method of inverse scattering. II

   • V. E. Zakharov
   • A. B. Shabat

   OriginalPaper Pages: 166 - 174

3. Curvature of groups of diffeomorphisms preserving the measure of the 2-sphere

   • A. M. Lukatskii

   OriginalPaper Pages: 174 - 177

4. Finiteness of quotient groups of discrete subgroups

   • G. A. Margulis

   OriginalPaper Pages: 178 - 187

5. Factorization of operators in L²(a, b)

   • L. A. Sakhnovich

   OriginalPaper Pages: 187 - 192

6. Ergodic properties of the lorentz gas

   • Ya. G. Sinai

   OriginalPaper Pages: 192 - 202

7. Topological structure of normally solvable first boundary-value problems in the plane

   • P. A. Frolov

   OriginalPaper Pages: 203 - 211

8. Construction of M-surfaces

   • O. Ya. Viro

   OriginalPaper Pages: 212 - 213

9. Representations of the group of local shifts of the space k^m, where k is a local non-Archimedean field

   • A. D. Gvishiani

   OriginalPaper Pages: 214 - 215

10. Maximal ideal spaces of invariant algebras

    • V. M. Gichev

    OriginalPaper Pages: 216 - 217

11. Continuous spectrum of a one-dimensional Schrödinger operator

    • A. Ya. Gordon

    OriginalPaper Pages: 218 - 220

12. Problem of reflection from a boundary for the equationh ²□u +ashu = 0 and finite-zone conditionally periodic solutions

    • S. Yu. Dobrokhotov
    • V. P. Maslov

    OriginalPaper Pages: 220 - 222

13. A theorem of M. G. Krein and M. A. Rutman

    • P. P. Zabreiko
    • S. V. Smitskikh

    OriginalPaper Pages: 222 - 223

14. A geometric criterion for strong linear convexity

    • S. V. Znamenskii

    OriginalPaper Pages: 224 - 225

15. Propagation of singularities of solutions of nonclassical boundary-value problems for the wave equation

    • V. Ya. Ivrii

    OriginalPaper Pages: 226 - 227

16. Divergence of series reducing an analytic differential equation to linear normal form at a singular point

    • Yu. S. Il'yashenko

    OriginalPaper Pages: 227 - 229

17. Operators of the regular representation for a class of non-Lie commutation relations

    • M. V. Karasev

    OriginalPaper Pages: 229 - 230

18. Extremal chains of subspaces for kolmogorov and linear diameters

    • V. E. Maiorov

    OriginalPaper Pages: 231 - 232

19. Asymptotic behavior of spectra of operators which are close to normal

    • A. S. Markus
    • V. I. Matsaev

    OriginalPaper Pages: 233 - 235

20. Finite propagation velocity and essential self-adjointness of certain differential operators

    • Yu. B. Orochko

    OriginalPaper Pages: 235 - 237