Unless otherwise indicated, copyrights on the content contributed to the WeBWorK Open Problem Library are held by the
author(s) of that content.  This includes the problem files (*.pg) and any associated auxililary files such as images and
custom macro files. 

Unless otherwise indicated, all contributions to the WeBWorK Open Problem Library are licensed under the 
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. To view a copy of this license, visit 

http://creativecommons.org/licenses/by-nc-sa/3.0/ 

or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View,
California, 94041, USA.


Contributors may use alternative open source licenses as defined by the Open Source Initiative:

http://www.opensource.org/licenses/index.html

Currently, to specify an alternative open source license to accompany a new contribution to the WeBWorK Open Problem 
Library, contributors should include the alternative license statement in the top-level directory containing their
contribution; contributors may also optionally include the license statement below the END_DOCUMENT(); line in each 
of their contributed problems.  License statements should include, at a minimum, the name of the license being applied
and a link to the full statement of the license.