画像:Hilbert.jpg

出典: フリー百科事典『ウィキペディア（Wikipedia）』

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Hilbert.jpg‎ (297 × 400 ピクセル, ファイルサイズ: 16 キロバイト, MIMEタイプ: image/jpeg)

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Español: David Hilbert.

David Hilbert

This photograph was taken in 1912 for postcards of faculty members at the University of Göttingen which were sold to students at the time (see "Hilbert", Constance Reid, Springer 1970). It was therefore published before 1923. Since it is not written in a foreign language, it is public domain in the US.

It is likely that the original copyright holder was the photographer, and it is reasonable to assume that someone of professional age in 1912 died before 1957. This does not affect the copyright status in the US, but may mean that the image is also in the public domain in countries where the copyright term is life of author plus 50 years.

	This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1923. See this page for further explanation.
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	This image might not be in the public domain outside of the United States (this especially applies in Canada, China (not Hong Kong, Macao, or Taiwan Area), Germany, Mexico, and Switzerland). The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.