Hausdorff

The philosopher Felix Hausdorff, famous for his foundational philosophical work Das Chaos in kosmischer Auslese (Chaos in Cosmic Selection) in which he rejects metaphysics, also did mathematics as a hobby . In mathematics he is known for Hausdorff spaces, the Hausdorff paradox, the Hausdorff gap, etc. etc. Hausdorff became a professor of mathematics in Leipzig, Germany, [ ]