Prof. Dr. Cun-Quang Zhang from West Virginia University in Morgantown, USA, visited the PACE and the working group of Prof. Dr. Eckhard Steffen from November 22 to 24, 2017. Prof. Dr. Cun-Quang Zhang is also invited speaker of the 36th Colloquium on Combinatorics (KolKom 2017) , which is organised from 24th to 25th November 2017 by PACE - Paderborn Center for Advanced Studies and the Department of Mathematics of Paderborn University.
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