\documentclass[11pt]{article}
\usepackage{latexsym}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsthm}
\usepackage{fullpage}
\usepackage{cmap}
\everymath=\expandafter{\the\everymath\displaystyle}
\DeclareMathSizes{24}{24}{24}{24}
\newcommand{\lecture}[3]{
  \noindent
  \begin{center}
  \framebox{
    \vbox{
      \hbox to 6.28in { {\bf CS 369M: Metric Embeddings and Algorithmic Applications } \hfill #3 }
      \vspace{4mm}
      \hbox to 6.28in { {\Large \hfill #1  \hfill} }
      \vspace{2mm}
      \hbox to 6.28in { {\em Lecturer: Moses Charikar \hfill Scribe: #2} }
    }
  }
  \end{center}
  \vspace*{4mm}
}


\newtheorem{theorem}{Theorem}[section]
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{observation}[theorem]{Observation}
\newtheorem{proposition}[theorem]{Proposition}
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\newtheorem{fact}[theorem]{Fact}
\newtheorem{assumption}[theorem]{Assumption}

\theoremstyle{definition}
\newtheorem{definition}[theorem]{Definition}
\theoremstyle{remark}
\newtheorem*{remark}{Remark}
\newtheorem{example}{Example}
\newtheorem{exercise}{Exercise}

\begin{document}

% Creates the header for the notes. Please fill in the number, date, and title of the lecture as well as your name.
\lecture{Lecture 1: Title of the Lecture}{Name}{Date}

\section{Introduction}

% Please use BibTeX for references.
%\bibliographystyle{plain}
%\bibliography{}

\end{document} 