Question: ABS and \[Prime]

*To*: mathgroup at smc.vnet.net*Subject*: [mg47461] Question: ABS and \[Prime]*From*: wellsed at wam.umd.edu (Ed Wells)*Date*: Tue, 13 Apr 2004 06:26:12 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hello, I'm not a regular duty Mathematica user and I've come across a problem in some of my work to which I cannot find an answer in Mathematica help or by googling. In my notebook output, a copy of which can be seen at : www.glue.umd.edu/~wellsed/derivatives.html I'm finding the derivatives of a complex function involving distances (R[] is a distance function) in an energy function (W[] is an energy function). Each of my derivatives looks okay except for the presence of the Abs[] function with a \[Prime] following it. It does not appear in every instance, but I cannot find any documentation for what this may mean. An example is in the first line of Out[36]. Any help is appreciated. --Ed Wells