Alexander_horned_sphere_construction_(Alexander_1924).jpg
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Summary
Description Alexander horned sphere construction (Alexander 1924).jpg |
English:
Diagram of the first few iterative steps in the construction of Alexander's horned sphere, from Alexander's original 1924 paper.
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Date | |
Source | Alexander, J. W. (1924), "An Example of a Simply Connected Surface Bounding a Region which is not Simply Connected", Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 10 (1): 8–10 |
Author | Alexander, J. W. |
Licensing
Public domain Public domain false false |
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public domain
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) before January 1, 1929.
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Note: This tag should not be used for sound recordings. PD-1923 Public domain in the United States //commons.wikimedia.org/wiki/File:Alexander_horned_sphere_construction_(Alexander_1924).jpg |