Prof. Dr. Gerik Scheuermann

I am deeply shocked. It will take time for me and others to realize how much we lost. Sayan was a great colleague with inspiring ideas. I admired his logical rigor as well as his will to develop new directions outside known paths. He brought together fields like topology, statistics, and data mining, and he did so with a depth that I might never reach.
Besides his excellence, he was always kind and fun to talk to. We had only a few nice evenings together, but I will miss him as colleague and friend.