File:Watanabe UglyDucklingTheorem svg.svg

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Original file (SVG file, nominally 1,063 × 797 pixels, file size: 154 KB)

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Summary

Description
English: Illustration of S. Watanabe's Ugly duckling theorem, based on an extract of a screenshot from the public domain short A Corny Concerto (1943)
Date (extraction date); 1943 (Original release date)
Source
image extraction process
This image has been extracted from another file
: A Corny Concerto (2).png
original file
Author OswaldLR
Other versions File:Watanabe UglyDucklingTheorem.pdf (description page includes LaTeX source code)

Licensing

(License inherited from source file:)

Public domain
This work is in the public domain because it was published in the United States between 1930 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.

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inception

5 December 2017

data size

157,653 byte

media type

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checksum

336f2220f0fc302ab850e944f24a9875b342287e

determination method or standard: SHA-1

File history

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Date/TimeThumbnailDimensionsUserComment
current21:45, 11 December 2017Thumbnail for version as of 21:45, 11 December 20171,063 × 797 (154 KB)wikimediacommons>Jochen Burghardtchoose observable proprties only ("eldest"-->"first")

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