File:Alexander horned sphere construction (Alexander 1924).jpg
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Size of this preview: 800 × 529 pixels. Other resolutions: 320 × 211 pixels | 640 × 423 pixels | 896 × 592 pixels.
Original file (896 × 592 pixels, file size: 77 KB, MIME type: image/jpeg)
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Summary
| Description |
English: Diagram of the first few iterative steps in the construction of Alexander's horned sphere, from Alexander's original 1924 paper. |
| 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
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1931.
 Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:26, 9 February 2021 | | 896 × 592 (77 KB) | wikimediacommons>Adumbrativus | Uploaded a work by Alexander, J. W. from 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 with UploadWizard |
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