1. Tribute to a Distinguished Professor János Aczél at 85

   • Che Tat Ng

   EditorialNotes 15 October 2010 Pages: 1 - 4

2. A characterization of dimension-free hyperbolic geometry and the functional equation of 2-point invariants

   • Walter Benz

   OriginalPaper 28 October 2010 Pages: 5 - 11

3. Hyers–Ulam stability of derivations and linear functions

   • Zoltán Boros
   • Eszter Gselmann

   OriginalPaper 03 August 2010 Pages: 13 - 25

4. On solutions of Aczél’s equation and some related equations

   • Nicole Brillouët-Belluot
   • Janusz Brzdȩk
   • Jacek Chudziak

   OriginalPaper 18 September 2010 Pages: 27 - 44

5. On a ρ-orthogonality

   • Jacek Chmieliński
   • Paweł Wójcik

   OriginalPaper Open access 15 September 2010 Pages: 45 - 55

6. Continuous cocycles on locally compact groups: II

   • Bruce Ebanks
   • Henrik Stetkær

   OriginalPaper 07 September 2010 Pages: 57 - 83

7. Axiomatic derivation of the Doppler factor and related relativistic laws

   • Jean-Claude Falmagne
   • Jean-Paul Doignon

   OriginalPaper Open access 11 August 2010 Pages: 85 - 99

8. On a class of functions of the interval with zero topological entropy

   • Gian Luigi Forti
   • Luigi Paganoni

   OriginalPaper 29 September 2010 Pages: 101 - 109

9. Additivity and exponentiality are alien to each other

   • Roman Ger

   OriginalPaper 16 September 2010 Pages: 111 - 118

10. Homomorphisms and boundedness in topological groups

    • Roman Ger
    • Maciej Sablik

    OriginalPaper Open access 29 July 2010 Pages: 119 - 130

11. On the measurable solutions of a functional equation

    • Antal Járai

    OriginalPaper 21 October 2010 Pages: 131 - 139

12. Almost convexity on Abelian groups

    • Witold Jarczyk

    OriginalPaper 16 September 2010 Pages: 141 - 154

13. On a composite functional equation fulfilled by modulus of an additive function

    • Tomasz Kochanek

    OriginalPaper Open access 08 June 2010 Pages: 155 - 172

14. The equivalence of two functional equations involving the arithmetic mean, the geometric mean and their Gauss composition

    • Gyula Maksa
    • Adrienn Varga

    OriginalPaper 03 August 2010 Pages: 173 - 179

15. A generalization of the Gołąb-Schinzel functional equation

    • Janusz Matkowski

    OriginalPaper Open access 17 September 2010 Pages: 181 - 192

16. Remarks on strongly convex functions

    • Nelson Merentes
    • Kazimierz Nikodem

    OriginalPaper 16 September 2010 Pages: 193 - 199

17. On generalized Dhombres equations with nonconstant polynomial solutions in the complex plane

    • Ludwig Reich
    • Jaroslav Smítal

    OriginalPaper 27 May 2010 Pages: 201 - 208

18. Jensen, multi-Jensen and polynomial functions on arbitrary abelian groups

    • Jens Schwaiger
    • Wolfgang Prager

    OriginalPaper 31 August 2010 Pages: 209 - 221

19. Spectral analysis on commutative hypergroups

    • László Székelyhidi
    • László Vajday

    OriginalPaper 31 August 2010 Pages: 223 - 226

20. Optimality estimations for approximately midconvex functions

    • Jacek Tabor
    • Józef Tabor
    • Marek Żołdak

    OriginalPaper 12 August 2010 Pages: 227 - 237