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I am using the amsmath package. I just want a black box at the end of a proof, right-justified.

\blacksquare and \box both cause errors.

Actually, I'd prefer a musical quarter note if that's possible :)

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The wasysym package provides \quarternote. – Torbjørn T. Oct 7 '11 at 1:39
what, precisely, are the errors? the open square used by amsthm (not defined in amsmath) is the open box at location hex03 in the msam font if amsfonts are loaded, otherwise it's a drawn box. if you're using amsthm, you can simply \renewcommand{\qedsymbol}{...} with whatever symbol you want, but if you're not using amsthm, i can't help without knowing more. – barbara beeton Oct 7 '11 at 21:15

1 Answer

up vote 2 down vote

Are you including the appropriate packages?

\documentclass{article}

\usepackage{amsmath}%
\usepackage{MnSymbol}%
\usepackage{wasysym}%

\begin{document}
$\blacksquare$  \halfnote \quarternote
\end{document}

See LaTeX Comprehensive symbols list.

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I was only including amsmath – iDontKnowBetter Oct 7 '11 at 1:14

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