**Using Hollow Instead of Solid Proof Boxes**

November 18, 2006

Mark Senn
**How can I use hollow instead of solid proof boxes to end a proof?**

After your \documentclass command and before your \begin{document} put

\usepackage{amssymb}
\sbox{\proofbox}{$\Box$}

lines.
Here is a complete, self-contained example:

\documentclass[cs]{puthesis}
\usepackage{amssymb}
\sbox{\proofbox}{$\Box$}
\begin{document}
\begin{proof}
This is a proof.
\end{proof}
\end{document}

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Revised: November 18, 2006

Created: November 18, 2006