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{{Draft|These guidelines were originally based on the excellent model at the [http://www.encyclopediaofmath.org/index.php/Encyclopedia_of_Mathematics:Copyrights Encyclopedia of Mathematics].}}

[[File:Cc-by-sa.png|thumb|CC-BY-SA]]

Unless otherwise indicated, text and images contributed by AAPG is copyright of AAPG and is formally licensed to the public under the [http://creativecommons.org/licenses/by-sa/3.0/ Creative Commons Attribution-Sharealike 3.0 Unported License] (CC-BY-SA).

Unless otherwise indicated, text and images contributed by AAPG is copyright of AAPG and is formally licensed to the public under the [http://creativecommons.org/licenses/by-sa/3.0/ Creative Commons Attribution-Sharealike 3.0 Unported License] (CC-BY-SA).

Any new text contributed to this wiki is copyrighted automatically (under the Berne Convention) by the contributors and is similarly licensed to the public under Creative Commons Attribution-Sharealike 3.0 Unported License (CC-BY-SA).

Any new text contributed to this wiki is copyrighted automatically (under [http://www.wipo.int/treaties/en/ip/berne/trtdocs_wo001.html the Berne Convention]) by the contributors and is similarly licensed to the public under Creative Commons Attribution-Sharealike 3.0 Unported License (CC-BY-SA).

The CC-BY-SA license grants free access to our content in the same sense that [http://en.wikipedia.org/wiki/Free_software free software] is licensed freely. Content can be copied, modified, and redistributed if and only if the copied version is made available on the same terms to others and acknowledgment of the authors of the wiki article used is included (a link back to the article satifies the attribution requirement). Copied Encyclopedia of Mathematics content will therefore remain free under appropriate license and can continue to be used by anyone subject to certain restrictions, most of which aim to ensure that freedom. This principle is known as copyleft in contrast to typical copyright licenses.

The CC-BY-SA license grants free access to our content in the same sense that [http://en.wikipedia.org/wiki/Free_software free software] is licensed freely. Content can be copied, modified, and redistributed if and only if the copied version is made available on the same terms to others and acknowledgment of the authors of the wiki article used is included (a link back to the article satisfies the attribution requirement). Copied Encyclopedia of Mathematics content will therefore remain free under appropriate license and can continue to be used by anyone subject to certain restrictions, most of which aim to ensure that freedom. This principle is known as copyleft in contrast to typical copyright licenses.

Please be aware that content of this wiki is covered by disclaimers.

Please be aware that content of this wiki is covered by [[AAPG Wiki:General disclaimer|disclaimers]].

 

For any reuse or distribution, you must make clear to others the license terms of this work. The best way to do this is with a link to this wiki page.

==Contributors' rights and obligations==

==Contributors' rights and obligations==

If you contribute text to this wiki, you thereby license it to the public for reuse under CC-BY-SA. Non-text media may be contributed under a variety of different open licenses that support the general goal of allowing unrestricted re-use and re-distribution. See Guidelines for images and other media files, below.

If you contribute text to this wiki, you thereby license it to the public for reuse under CC-BY-SA. Non-text media may be contributed under a variety of different open licenses that support the general goal of allowing unrestricted re-use and re-distribution. See Guidelines for images and other media files, below.

Contributors who repeatedly post copyrighted material despite appropriate warnings may be blocked from editing by any administrator to prevent further problems.

Contributors who repeatedly post copyrighted material despite appropriate warnings may be blocked from editing by any administrator to prevent further problems.

If you suspect a copyright violation, you should at least bring up the issue on that page's discussion page. Others can then examine the situation and take action if needed. Some cases will be false alarms. For example, text that can be found elsewhere on the Web that was in fact copied from the Encyclopedia of Mathematics in the first place is not a copyright violation on Encyclopedia of Mathematics's part.

If you suspect a copyright violation, you should at least bring up the issue on that page's discussion page. Others can then examine the situation and take action if needed.  

If a page contains material which infringes copyright, that material – and the whole page, if there is no other material present – should be removed. See Copyright violations for more information, and Copyright problems for detailed instructions

If a page contains material which infringes copyright, that material – and the whole page, if there is no other material present – should be removed. See Copyright violations for more information, and Copyright problems for detailed instructions

==Works by the United States Federal Government==

==Works by the United States Federal Government==

Works produced by employees of the United States federal government in the scope of their employment are public domain by statute in the United States (though they may be protected by copyright outside the US). The employee must have made the work ''as part of his/her duties''.

Works produced by employees of the United States federal government in the scope of their employment are public domain by statute in the United States (though they may be protected by copyright outside the US). The employee must have made the work ''as part of his/her duties''.