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File:Albert Einstein writing on a blackboard in Pasadena (1931).jpg

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English: Albert Einstein writes a density formula of the Milky Way on January 14, 1931 on the board of the Carnegie Institute of the Mt. Wilson Observatory in Pasadena, California.

Text for a tensor element is 

R ik = 0 ?
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https://www.voanews.com/student-union/student-74-follows-einsteins-footsteps

https://www.apimages.com/metadata/Index/DEU-Forschung-Quantenphysik/ce5580ea4cbd4e4d8098482dbc0cf90f/36/0
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Associated Press (fl. 1940)  wikidata:Q40469 s:en:Portal:Associated Press
 
Associated Press
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AP; AP Wire; the Associated Press; the AP; The Associated Press; apnews.com; ap.org
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Work period 1940 Edit this at Wikidata
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creator QS:P170,Q40469

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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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Date/TimeThumbnailDimensionsUserComment
current20:38, 10 January 2023Thumbnail for version as of 20:38, 10 January 20232,294 × 3,000 (1.79 MB)Cali.maid408 (talk | contribs)Reverted to version as of 17:29, 28 August 2021 (UTC)
09:53, 1 September 2021Thumbnail for version as of 09:53, 1 September 20212,294 × 3,000 (1.6 MB)Remitamine (talk | contribs)Exif Metadata
17:29, 28 August 2021Thumbnail for version as of 17:29, 28 August 20212,294 × 3,000 (1.79 MB)Sabas88 (talk | contribs)Uploaded a work by ASSOCIATED PRESS from https://www.voanews.com/student-union/student-74-follows-einsteins-footsteps https://www.apimages.com/metadata/Index/DEU-Forschung-Quantenphysik/ce5580ea4cbd4e4d8098482dbc0cf90f/36/0 with UploadWizard

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