1. Creative Contribution of D. Ya. Petrina to the Development of Contemporary Mathematical Physics

   • V. I. Herasymenko
   • P. V. Malyshev

   OriginalPaper Pages: 357 - 373

2. BCS Model Hamiltonian of the Theory of Superconductivity as a Quadratic Form

   • D. Ya. Petrina

   OriginalPaper Pages: 374 - 409

3. On the Optimal Coefficient of Efficiency of a Semi-Markov System in the Scheme of Phase Lumping

   • N. G. Vovkodav
   • L. N. Shlepakov

   OriginalPaper Pages: 410 - 419

4. On Permutable Congruences on Antigroups of Finite Rank

   • V. D. Derech

   OriginalPaper Pages: 420 - 426

5. Coconvex Approximation of Functions with More than One Inflection Point

   • H. A. Dzyubenko
   • V. D. Zalizko

   OriginalPaper Pages: 427 - 445

6. Nevanlinna–Pick Problem for Stieltjes Matrix Functions

   • Yu. M. Dyukarev

   OriginalPaper Pages: 446 - 465

7. Boundary Functionals of a Semicontinuous Process with Independent Increments on an Interval

   • T. V. Kadankova

   OriginalPaper Pages: 466 - 488

8. Euler Approximations of Solutions of Abstract Equations and Their Applications in the Theory of Semigroups

   • Yu. S. Mishura
   • H. M. Shevchenko

   OriginalPaper Pages: 489 - 503

9. On the Discreteness of the Structural Space of Weakly Completely Continuous Banach Algebras

   • G. S. Mustafaev

   OriginalPaper Pages: 504 - 511

10. On the Decomposition of an Operator into a Sum of Four Idempotents

    • V. I. Rabanovych

    OriginalPaper Pages: 512 - 519

11. Interpolation Sequences for the Class of Functions of Finite η-Type Analytic in the Unit Disk

    • B. V. Vynnyts'kyi
    • I. B. Sheparovych

    OriginalPaper Pages: 520 - 526