Ulrich Kohlenbach
Ulrich Wilhelm Kohlenbach (born 27 July 1962 in Frankfurt am Main) is a German mathematician and professor of algebra and logic at the Technische Universität Darmstadt. His research interests lie in the field of proof mining.Kohlenbach was president of the German Association for Mathematical Logic and for Basic Research in the Exact Sciences (DVMLG) from 2008 to 2012 and president of the Association for Symbolic Logic from 2016 to 2018. Provided by Wikipedia