I wonder if there is some TeX magic, that lets me undefine a LaTeX command, \Re say.
Then I could write a math_macro that has also the right look opposed to the
present version with the pr�amble renewcommand:
\renewcommand{\Re}{\mathrm{Re}}
(of course, a macro feature that lets the user choice between \newcommand
\providecommand (or no latex command) and \renewcommand is still on my wishlist)
GM
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