Image:Leibniz to Wolff on Grandi.jpg

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[edit] Summary

Photographic reproduction of half of the first paragraph of a letter by Gottfried Leibniz to Christian Wolff on the subject of Grandi's series 1 − 1 + 1 − 1 + · · ·, as published in the Acta Eruditorum in 1713.

Both the text itself, and the page on which it is printed, should be in the public domain due to age. Immediate image source: copied out of [1].

[edit] Licensing

This is a faithful photographic reproduction of an original two-dimensional work of art. The original image comprising the work of art itself is in the public domain for the following reason:
Public domain This image (or other media file) is in the public domain because its copyright has expired.

This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.

Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement that rule of the shorter term.

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Under United States copyright law, originality of expression is necessary for copyright protection, and a mere photograph of an out-of-copyright work may not be protected under U.S.copyright law. This photograph was taken in the U.S. or in another country where a similar rule applies (for a list of allowable countries, see Commons:When to use the PD-Art tag#Country-specific rules).
This photographic reproduction is therefore also in the public domain.

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File history

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Date/TimeDimensionsUserComment
current09:14, 5 November 2006421×315 (57 KB)Melchoir (Photographic reproduction of a letter by Leibniz, as published in 1713. Both the text itself, and the page on which it is printed, should be in the public domain due to age. Immediate image source: copied out of [http://www.cimt.plymouth.ac.uk/journal/bag)
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