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| | [No title] |
 | | Knopfmacher}, University of Melbourne and Centre for Applicable Analysis and Number Theory, Wits, {\it Arithmetical Semigroups and Enumeration of Maps On Surfaces}, 31st August 1998 [17. |
 | | Diethelm}, University of Hildesheim, Germany, {\it Applications of Integral Equations with Cauchy or Hadamard Integrals in Physics and Engineering}, 14th September 1998 [19. |
 | | Professor Kai Diethelm from the University of Hildesheim, Hildesheim, Germany visited me at the University of the Witwatersrand from 7--19 September, 1998. |
| www.wits.ac.za /science/number_theory/centre99.htm (3194 words) |
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