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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