The package provides \centernot that prints the symbol \not on the following argument. Unlike the default \not command, the symbol is horizontally centered.
The package is part of the oberdiek bundle.
The author is Heiko Oberdiek. The package is Copyright © 2006,2007,2010,2011 Heiko Oberdiek.
License: lppl1.3 Version: 1.4, dated: 2016-05-16 Catalogued: 2016-05-17