Jürgen Herzog
Jürgen Reinhard Gerhard Herzog (; born 21 December 1941) is an Emeritus Professor of Mathematics at University of Duisburg-Essen, in Essen, Germany. From 1969 to 1975, he was Lecturer at University of Regensburg and from 1975 to 2009 a professor of Mathematics at University of Duisburg-Essen. Provided by Wikipedia
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