# Declaring a newcommand for a single letter in mathcal

I am trying to enter a command that references the \mathcal font for single letter in LaTeX. Below is what I am trying and it doesn't seem to work, would appreciate any help.

 \newcommand {\until} {\mathcal {u} }


I believe by doing this, when I type \until it should apply the u in the desired font.

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It does, but the mathcal alphabet is only available in uppercase so you get a square cap symbol. Try it with U instead. –  David Carlisle Dec 12 '12 at 23:48
Yeah lowercase letter seems to be the fault, thanks. –  mitchnufc Dec 12 '12 at 23:53
You can have lower case calligraphic letters with some fonts, e.g., Zapf chancery: \DeclareMathAlphabet{\mathpzc}{OT1}{pzc}{m}{it} ... $\mathpcz{u}$ –  mafp Dec 13 '12 at 0:00

Use capital letter(s) U.

\documentclass{scrartcl}
\newcommand{\until} {\mathcal{U} }

\begin{document}

$\until$
\end{document}


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Yeah this seems to work fine, thanks. –  mitchnufc Dec 12 '12 at 23:53