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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1939 Jan;25(1):52–54. doi: 10.1073/pnas.25.1.52

On the Concept of a Topological Space

J W Alexander 1
PMCID: PMC1077708  PMID: 16577873

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Articles from Proceedings of the National Academy of Sciences of the United States of America are provided here courtesy of National Academy of Sciences

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