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}

Revised: November 18, 2006
Created: November 18, 2006