LaTeX Forum

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\documentclass[a4paper,12pt]{article}

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\usepackage{tabularx}
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\usepackage{amssymb,amsmath,amsfonts}
\usepackage{amsthm}
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\usepackage{etex}
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\epstopdfsetup{suffix=}
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\def\braketm#1#2#3{\mathinner{\left\langle{#1}\left|{#2}\right|{#3}\right\rangle}}
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\begin{document}

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