The Editorial Board of Reliable Computing is dedicating this issue to
Prof. Dr. G
on the occasion of his 60th birthday.
otz Alefeld received his Master’s (“Diplom”) degree in Mathematics from the
Technical University of Munich in 1966. In that same year, Ulrich Kulisch, who
at that time was working in Munich, was appointed Professor at the Karlsruhe
Technical University. Alefeld followed Kulisch to Karlsruhe to study under him
and, in 1968, received his Ph.D. Alefeld’s dissertation dealt with complex inter-
val arithmetic and its applications. In the following years, Alefeld continued his
fruitful research on interval methods in numerical computations. In 1972, he
obtained his Habilitation from the Mathematics Department of Karlsruhe Tech-
After teaching in Karlsruhe, Bielefeld, and Kaiserslautern, he became a Full
Professor at the Technical University of Berlin in 1976. In 1981, he succeeded Prof.
Johannes Weissinger on a Chair for Applied Mathematics, his present position.
During several terms since 1979 he was a visiting professor at the universities of
Calgary (Canada), Atlanta and Iowa (both USA).
otz Alefeld served the academic community in various duties, among them
as a dean of the Faculty of Mathematics at the University of Karlsruhe, and as the
Speaker of the Conference of the Mathematical Departments in Germany. In 1999,
after having been Treasurer of GAMM (German Society for Applied Mathematics
and Mechanics—Gesellschaft f
ur Angewandte Mathematik und Mechanik), he was
elected GAMM’s President, a position he still holds. He is on the editorial boards
of Reliable Computing, ZAMM, and Computing.
Alefeld worked on different ﬁelds of scientiﬁc computing. His book, togeth-
er with J
urgen Herzberger and Otto Mayer, Einf
uhrung in das Programmieren
mit ALGOL 60 was basic for teaching and learning the programming language
ALGOL 60 in the seventies. His joint book with J
urgen Herzberger, Einf
die Intervallrechnung (Introduction to Interval Computations) was translated into
English and Russian and became a classic in all three languages. His scientiﬁc
work particularly shaped our today’s understanding of interval enclosure methods
for nonlinear systems of equations. Alefeld has been cooperating with numerous
scientists all over the world; overall, he has published well over 100 scientiﬁc papers.
He was supervisor of more than 15 Ph.D. theses, three of his pupils habilitated and