Mathematician:Felix Hausdorff

Mathematician
German mathematician fundamental in the development of modern topology.

Also active in set theory, measure theory and function theory.

The first to formulate what is now known as the Generalized Continuum Hypothesis. Committed suicide in preference to being sent to an internment camp.

Nationality
German

History

 * Born: 8 Nov 1868 in Breslau, Germany (now Wroclaw, Poland)
 * Died: 26 Jan 1942 in Bonn, Germany

Theorems and Definitions

 * Hausdorff's Maximal Principle, also known as Hausdorff Maximality Principle
 * Hausdorff Moment Problem
 * Hausdorff Paradox
 * Hausdorff Principles, also known as Maximal Principles or Kuratowski Principles (for )
 * Hausdorff-Young Inequality (with )


 * Baker-Campbell-Hausdorff Formula (with and )
 * Gromov-Hausdorff Convergence (with )


 * Hausdorff Dimension
 * Hausdorff Measure
 * Hausdorff Space (also known as a $T_2$ Space)
 * Minimal Hausdorff Topology

Publications

 * 1891: Zur Theorie der astronomischen Strahlenbrechung (doctoral thesis)
 * 1908: Grundzüge einer Theorie der geordneten Mengen


 * 1914:
 * 1937: (third edition of )


 * 1919: Dimension und äusseres Mass (in which Hausdorff Dimension was introduced)
 * 1921: Summationsmethoden und Momentfolgen



Also published works in the field of philosophy and literature under the pseudonym Paul Mongré:
 * 1897: Sant' Ilario: Thoughts from Zarathustra's Country
 * 1898: Das Chaos in kosmischer Auslese (a critique of metaphysics)
 * 1900: Ekstases (a book of poetry)
 * 1904: Der Arzt seiner Ehre

Later Translations

 * 1957: (translated by  from )
 * 1962:
 * 1978:
 * 1991: