1. Otto Haupt, March 5, 1887 – Nov. 10, 1988

   Obituary Pages: 129 - 129

2. On the genus of the complex projective plane

   • Carlo Gagliardi

   Research Papers Pages: 130 - 140

3. A Hahn-Banach theorem for separation of semigroups and its applications

   • Zsolt Páles

   Research Papers Pages: 141 - 161

4. Generalized characteristic equation of branching information measures

   • Bruce R. Ebanks

   Research Papers Pages: 162 - 178

5. Holomorphic solutions of an inhomogeneous Cauchy equation

   • Luigi Paganoni
   • Stefania Paganoni Marzegalli

   Research Papers Pages: 179 - 200

6. Iterative characterizations of powers and exponentials

   • S. L. Segal

   Research Papers Pages: 201 - 218

7. A representation theorem for entropies with the branching property

   • B. Forte
   • W. Hughes

   Research Papers Pages: 219 - 232

8. Regularity properties of functional equations and inequalities

   • Karl-Goswin Grosse-Erdmann

   Research Papers Pages: 233 - 251

9. Boundedness and continuity of additive and convex functionals

   • R. Ger
   • Z. Kominek

   Research Papers Pages: 252 - 258

10. On four-colourings of the rational four-space

    • Joseph Zaks

    Research Papers Pages: 259 - 266

11. Une généralisation d'un résultat de J. Aczél et M. Hosszú sur l'équation de translation

    • Zenon Moszner

    Research Papers Pages: 267 - 278

12. On Darboux solutions of the Euler's equation

    • J. Smítal

    Research Papers Pages: 279 - 281

13. Über ein Problem von J. Schwaiger und Z. Moszner betreffend die Vertauschbarkeit von einparametrigen Automorphismengruppen formaler Potenzreihenringe

    • Ludwig Reich

    Research Papers Pages: 282 - 292

14. Proportion functions in three dimensions

    • Claudi Alsina
    • Walter Benz

    Research Papers Pages: 293 - 305

15. The associativity equation revisited

    • R. Craigen
    • Z. Páles

    Research Papers Pages: 306 - 312

16. Equidissections of centrally symmetric octagons

    • Sherman Stein

    Research Papers Pages: 313 - 318