Studied mathematics 1969-1975 and 1979-1980 (University of Erlangen, Germany, 1969-1972, university of Konstanz, Germany, 1972-1975, and univeristy of Münster, Germany, 1979-1980)
Working in IT industry (1976-2008 in Germany, München, Dortmund, and Nürnberg; in Stockholm, Sweden, 2008-2012; again in Nürnberg, Germany, since 2012)
Doing mathematics and a bit of mathematic research as hobby. Hoping to do more when retired from IT industry. Specialized to n queens problem.
Use Matthias.R.Engelhardt@web.de for contact.