Freie Universität Berlin
Institut für Mathematik II
Arnimallee 3
D-14195 Berlin
Germany
E-Mail: aigner@math.fu-berlin.de
Telefon: +49 30/838-75443
Telefon: +49 30/838-75396 (Secretariate)
Telefax: +49 30/838-75404
Professor at FU Berlin since 1974.
Fields of mathematical interest: Combinatorial theory, graph theory