Anna is a professor in the Department of Mathematics at the University of Cologne. Her research interests are: combinatorial theory of simplicial complexes, in particular random simplicial complexes, higher-dimensional expansion, and spectral properties of simplicial complexes.
David is a professor in the Thomas-Institut at the University of Cologne, Germany. His research interests are Arabic and Hebrew philosophy, medieval psychology and philosophy of nature, and the relation of medical and physical knowledge.
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