Gesamtheft 29(3).

The article presents an issue of the periodical related to Deutsche Mathematiker-Vereinigung. Topics include attempts of Felix Hausdorff, a German mathematician, founder of modern set theory Topology described how to save life from the anti-Semitic threat of the Nazis; and disenfranchisement of Jewish scientists after in material and in general social and cultural terms of modern set-theoretic topology, serve mathematicians as an illustration of introductory remarks and rise of nationalism.