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IX . T YPESETTING T HEOREMS

\begin{proof} This follows easily from the equation \begin{equation*} (x+y)ˆ2=xˆ2+yˆ2+2xy\qed \end{equation*} \renewcommand{\qed}{} \end{proof}

IX . 3 . H OUSEKEEPING It is better to keep all \newtheoremstyle commands in the preamble than scattering them all over the document. Better still, you can keep them together with other customization in a personal .sty file and load it using the \usepackage command in the preamble. Also, within this .sty file, you can divide your \newtheorem commands into groups and preface each group with the appropriate \theoremstyle .

B IBLIOGRAPHY

[ 1 ] Euclid, The Elements , Greece 300 BC