[texhax] Odd behavior in a \mathop

[R. A. Bailey]

If you have a single-letter mathop it gets vertically centered unless you 
put it in a box.  For example, I normally define the expectation operator 
by

\newcommand{\expect}{\mathop{\mbox{$\mathbb E$}}\nolimits}


Rosemary Bailey

On Mon, 3 Nov 2008, Michael Barr wrote:

> If you compile the file
> \documentclass{article}
> \newcommand\II{\mathop{I\mkern-1mu I}}
> \newcommand\I{\mathop{I}}
> \begin{document}
> 
> $AB\II L$
> 
> $AB\I L$
> 
> \end{document}
> 
> you will see (or I do anyway) that the I in the second, but not the first, 
> formula is going distinctly below the line.  What is going on here?  If 
> you take out the \mathop this does not happen.
> 
> Michael Barr
> 
> 
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