All text is available under the terms of the GNU Free Documentation License (GFDL) with no invariant sections, front-cover texts, or back-cover texts.
If you contribute to xbeta, you thereby agree to license the contributed material to the public under the GFDL. There are two possible scenarios:
In the first scenario, you may retain the copyright to your work. You are free to release the submitted material later under any license you wish. However, the material you have submitted will retain the original GFDL license forever.
The second case applies if the original source was licensed under the GFDL or was released to the public domain.
Note that mathematical equations are works of nature and are not protected under U.S. copyright law.
If you suspect a copyright infringement, please notify Jason Blevins <jrblevin@sdf.lonestar.org>.