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Romanian mathematician, known for his work in algebraic topology, especially homotopy theory.
- Born: 1922
- Died: 1971
Theorems and Inventions
- 1957: On the Lusternik-Schnirelmann category of abstract groups (Annals of Mathematics Ser. 2nd Vol. 65, no. 3: 517 – 518) (with Samuel Eilenberg)