1. From the editors

   Letter Pages: 255 - 256

2. Orbits of greatest dimension in semi-simple linear Lie groups

   • E. M. Andreev
   • É. B. Vinberg
   • A. G. Élashvili

   OriginalPaper Pages: 257 - 261

3. Pseudo-differential operators and Cauchy problem for differential equations with variable coefficients

   • L. R. Volevich
   • S. G. Gindikin

   OriginalPaper Pages: 262 - 277

4. Existence of absolute bases in orlicz spaces

   • V. F. Gaposhkin

   OriginalPaper Pages: 278 - 284

5. Topology of noncompact Lie groups

   • I. M. Gel'fand
   • D. B. Fuks

   OriginalPaper Pages: 285 - 295

6. Spectral properties of dynamical systems with an integral invariant on the torus

   • A. B. Katok

   OriginalPaper Pages: 296 - 305

7. Nonisomorphism of certain spaces of functions of different numbers of variables

   • G. M. Khenkin

   OriginalPaper Pages: 306 - 315

8. One class of linear representations of complex, semisimple Lie groups

   • R. S. Ismagilov

   OriginalPaper Pages: 316 - 321

9. Quasi-direct sums of spaces

   • M. S. Brodskii
   • G. É. Kisilevskii

   OriginalPaper Pages: 322 - 324

10. Dimension of commutative subrings in R_n,k

    • I. N. Bernshtein

    Brief Communications Pages: 325 - 327

11. Simple graduated Lie algebras of finite growth

    • V. G. Kats

    Brief Communications Pages: 328 - 329

12. Plancherel measure for nilpotent Lie groups

    • A. A. Kirillov

    Brief Communications Pages: 330 - 331

13. Chains of projectors, similar to orthogonal

    • A. S. Markus
    • V. A. Prigorskii

    Brief Communications Pages: 332 - 333