Obere Reihe: E. Cech, H. Whitney, K Zarankiewicz, A. Tucker, S. Lefschetz, H. Freudenthal, F. Frankl, J. Nielsen, K. Borsuk, , J. D. Tamarkin, , V. Stepanoff, E. R. van Kampen, A. Tychonoff Untere Reihe: C. Kuratowski, J. Schauder, St. Cohn-Vossen, P. Heegaard, J. Rozanska, J. W. Alexander, H. Hopf, P. Alexandroff, , 148 ETH-BIB--Portrait-

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