1. Characterizations of sum form information measures on open domains

   • Bruce R. Ebanks
   • Palaniappan Kannappan
   • Wolfgang Sander

   Survey Paper Pages: 1 - 30

2. Jordan *-derivation pairs and quadratic functionals on modules over *-rings

   • B. Zalar

   Research Papers Pages: 31 - 43

3. Jordan *-derivation pairs on a complex *-algebra

   • L. Molnár

   Research Papers Pages: 44 - 55

4. A modulus of smoothness based on an algebraic addition

   • M. Felten

   Research Papers Pages: 56 - 73

5. On Hyers-Ulam stability for a class of functional equations

   • Costanza Borelli

   Research Papers Pages: 74 - 86

6. On factorizing meromorphic functions

   • Ian N. Baker

   Research Papers Pages: 87 - 101

7. Spectral variation bounds for diagonalisable matrices

   • Rajendra bhatia
   • Ludwig Elsner
   • Gerd M. Krause

   Research Papers Pages: 102 - 107

8. Fractal penrose tiles II: Tiles with fractal boundary as duals of penrose triangles

   • Götz Gelbrich

   Research Papers Pages: 108 - 116

9. Quadratische Identitäten bei Polygonen

   • Wolfgang Schuster

   Research Papers Pages: 117 - 143

10. Functional equations on abelian groups with involution

    • H. Stetkær

    Research Papers Pages: 144 - 172

11. Inequalities for sums of independent geometrical random variables

    • Milan Merkle
    • Ljiljana Petrović

    Research Papers Pages: 173 - 180

12. A package for symbolic solution of real functional equations of real variables

    • Enrique Castillo
    • Andres Iglesias

    Research Papers Pages: 181 - 198

13. On a superadditivity property of Gram’s determinant

    • Sever S. Dragomir
    • Bertram Mond
    • Zsolt Páles

    Research Papers Pages: 199 - 204

14. Paul Erdős, 1913–1996

    • Vera T. Sós

    Obituaries Pages: 205 - 220

15. Paul Erdős on functional equations: Contributions and impact

    • László Losonczi

    Obituaries Pages: 221 - 233

16. Some remarkable lines of triangles in real normed spaces and characterizations of inner product structures

    • Claudi Alsina
    • Piedad Guijarro
    • Maria S. Tomás

    Research Papers Pages: 234 - 241

17. On two functional equations connected with the characterizations of the distance measures

    • Thomas Riedel
    • Prasanna K. Sahoo

    Research Papers Pages: 242 - 263

18. Forme normale d’Arnold et réduction formelle des systèmes d’équations linéaires aux différences

    • Guoting Chen

    Research Papers Pages: 264 - 288

19. A characterization of monomial functions

    • Attila Gilányi

    Research Papers Pages: 289 - 307

20. On nonstrict means

    • János C. Fodor
    • Jean-Luc Marichal

    Research Papers Pages: 308 - 327