[comp.text.tex] Getting rid of minus signs

pi@eng.cam.ac.uk (Pablo Iglesias) (03/25/91)

Hello

I want to create a command in LaTeX which would do the following:

\negate{A} would give me -A.  
\negate{-A} would give me A.

I have tried tried using \@ifnextchar to test whether there is one or
two minus signs.  Unfortunately, I do not know how to extract the "absolute" 
part of the argument.  

Could anyone give me any pointers as to how to write this command, or even 
better, can someone show me how it's done! :-)

Thanks in advance,

Pablo



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Pablo Iglesias                  Phone : +44 223 332813           
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Cambridge University            email :  pi@eng.cam.ac.uk        
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