[texhax] \twoheaduparrow

Barbara Beeton bnb at ams.org
Thu Oct 27 16:21:37 CEST 2005

here's something i put together for another purpose
that i think will help.  a 90 degree rotation will
turn a right arrow upright.
 							-- bb

---------- Original message ----------
Date: Thu, 27 Oct 2005 08:02:14 -0400
From: Zbigniew Nitecki <zbigniew.nitecki at tufts.edu>
To: support at tug.org
Subject: [texhax] \twoheaduparrow

I'm unfamiliar with the defining code for ams symbols, but would like
to create the \uparrow equivalent of \twoheadrightarrow.  How do I do

Zbigniew Nitecki
Department of Mathematics
Tufts University
Medford, MA 02155

Office    (617)627-3843
Dept.    (617)627-3234
Dept. fax    (617)627-3966


\nofiles % don't need .aux file


\section*{New symbols from old}
Sometimes one needs a symbol that can't be found in any font,
but that is either a rotation or a reflection of a sybol that
\emph{is} available.  \texttt{graphicx} package to the rescue!

Define some suitable commands to provide the desired degree of
rotation or to reflect an object:
Then you can use these commands to produce your new symbols:
Combining these two techniques to obtain a symbol that is both
rotated and reflected is left as an exercise for the reader.

When you define new names for such symbols, it's a good idea to
specify the class (\verb|\mathord|, \verb|\mathbin|, etc.)\ in
the definition so you get the correct spacing when they're used.

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