Semicolons Are Often Used in Mathematics

In the languages of functions, a semicolon in the argument of a function preceding a variable indicates that the function may be a function of that variable, but is not necessarily.

In differential geometry, a semicolon preceding an index is used to indicate the covariant derivative of a function with respect to the coordinate associated with that index.

Copyright © 2005-2010 The-Semicolon.com. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled “GNU Free Documentation License”.