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I would like to use some ams symbol in my presentation, like arrows or aother kind of symbol. When I use the command \ding with the relative code for display the symbol, I receive an error during the compile procedure:

! Undefined control sequence.
\beamer@doifinframe ...ne & n. \\ \midrule A\ding
{221}B\ding {221}C\ding {2...
l.40 \end{frame}
The control sequence at the end of the top line
of your error message was never \def'ed

My code is:

\documentclass[xcolor=table, t]{beamer}


\title{my presentation}




Transizione & n. \\ 
A\ding{221}B\ding{221}C\ding{221}A & 54 \\
D\ding{221}C\ding{221}B\ding{221}C\ding{221}D & 30 \\
D\ding{221}C\ding{221}B\ding{221}C & 23 \\


thanks in advance for the help

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up vote 4 down vote accepted

That are no ams symbols

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Ok it works. thanks a lot for the clarification – user21431 Jul 25 '14 at 9:04

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