In About semi-continuous functions and their generalization, Hausdorff had, among other things, given another proof of the Tietze extension theorem
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In About semi-continuous functions and their generalization, Hausdorff had, among other things, given another proof of the Tietze extension theorem
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-18 from Wikipedia. The archived copy is preserved so this citation survives link rot.