1. Tribute to a Distinguished Professor János Aczél at 80

   • Bruce Ebanks
   • Che Tat Ng

   Dedication Pages: 1 - 5

2. Quasisums and generalized associativity

   • Gyula Maksa

   Research paper Pages: 6 - 27

3. On continuity of solutions to some equations of iteration theory

   • Karol Baron
   • Witold Jarczyk

   Research paper Pages: 28 - 31

4. Hermite–Hadamard inequalities for generalized convex functions

   • Mihály Bessenyei
   • Zsolt Páles

   Research paper Pages: 32 - 40

5. Multi-affine and multi-Jensen functions and their connection with generalized polynomials

   • Wolfgang Prager
   • Jens Schwaiger

   Research paper Pages: 41 - 57

6. On linear combinations of weighted quasi-arithmetic means

   • Zoltán Daróczy
   • Gabriella Hajdu

   Research paper Pages: 58 - 67

7. On integrality and periodicity of the Motzkin numbers

   • Martin Klazar
   • Florian Luca

   Research paper Pages: 68 - 75

8. Stability of the entropy equation

   • Jacek Tabor
   • Józef Tabor

   Research paper Pages: 76 - 82

9. Singular boundary value problems for first and second order impulsive differential equations

   • Ravi P. Agarwal
   • Daniel Franco
   • Donal O’Regan

   Research paper Pages: 83 - 96

10. On multiplicative and additive differences

    • Bruce Ebanks
    • László Székelyhidi

    Research paper Pages: 97 - 113

11. On integer sequences whose first iterates are linear

    • Jean-Paul Allouche
    • Narad Rampersad
    • Jeffrey Shallit

    Research paper Pages: 114 - 127

12. Variants of the distributivity equation arising in theories of utility and psychophysics

    • Anders Lundberg

    Research paper Pages: 128 - 145

13. On distant-isomorphisms of projective lines

    • Andrea Blunck
    • Hans Havlicek

    Research paper Pages: 146 - 163

14. The Forty-second International Symposium on Functional Equations, June 20–27, 2004, Opava, Czech Republic

    • Aleš Ryšavý
    • Marta Štefánková

    Report of Meeting Pages: 164 - 200