On Homotopy and Extension of Mappings

Proceedings of the National Academy of Sciences 1940 / 04 Vol. 26; Iss. 1

On Homotopy and Extension of Mappings

Ralph H. Fox
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Volume:
26
Language:
english
Journal:
Proceedings of the National Academy of Sciences of the United States of America
DOI:
10.2307/87363
Date:
April, 1940
File:
PDF, 161 KB
english, 1940
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