\documentclass[11pt]{article}
\usepackage{amsmath}
\usepackage{amsfonts} %new inclusion for fonts!
\usepackage{amsthm} %new inclusion for theorem environments!

\input colin.sty
\input epsf.sty

\textwidth = 6.5 in
\oddsidemargin = 0.0 in
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\newtheorem{theorem}{Theorem}[section]
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{proposition}[theorem]{Proposition}

\theoremstyle{definition}
\newtheorem{definitionn}[theorem]{Definition}


\title{Math 251-02/03 Homework 10}

\begin{document}

\maketitle

%Rough drafts due 4/16/12, edits due 4/18/12, final drafts due 4/20/12.\\


\textbf{Problems to Turn in:}


\textbf{Problems to Keep:}

\begin{enumerate}
\item \textbf{6.5.1}
\item \textbf{6.5.2}
\item \textbf{6.5.6}
\item \textbf{6.5.9}
\item \textbf{6.5.11}
\item \textbf{6.6.1}
\item \textbf{6.6.4} (This is a good one to know.)
\end{enumerate}


\end{document} 