\usepackage{fullpage}
\usepackage{latexsym}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{latexsym}
\usepackage{graphicx}
\usepackage{color}
\usepackage[x11names,rgb]{xcolor}
\usepackage{tikz}
\usepackage{algorithmic}
%\usepackage{pseudocode}

\newcommand{\handout}[4]{
%argument 1: lecture number
%argument 2: date
%argument 3: lecturer 
%argument 4: scribe
   \setcounter{page}{1}
   \renewcommand{\thepage}{#1-\arabic{page}}
   \noindent
   \begin{center}
    \framebox[\textwidth]{
      \parbox{\textwidth}{
        \vspace*{1ex}
        {\Large 
        \hspace*{\fill} {\bf Matchings in Graphs} \hspace*{\fill} 
        } \\[2ex]
        \begin{tabular}{rl}
          {\it Lecturer:} & {\it #3} \\
          {\it Scribe:} & {\it #4} 
        \end{tabular}
        \hfill
        \begin{tabular}{c}
        Meeting: #1 \\ 
        #2 
        \end{tabular}
        \vspace*{1ex}
      }
    }
   \end{center}
   \vspace*{4mm}
}


\newtheorem{theorem}{Theorem}
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{claim}[theorem]{Claim}
\newtheorem{definition}[theorem]{Definition}
\newtheorem{fact}[theorem]{Fact}
\newtheorem{prop}[theorem]{Proposition}
\newtheorem{remark}[theorem]{Remark}
\newtheorem{example}[theorem]{Example}
\newcommand{\qed}{\rule{7pt}{7pt}}
\newenvironment{proof}{\noindent{\bf Proof:}}{\hfill\qed\bigskip}
\newenvironment{proof_of_claim}{\noindent{\bf Proof of Claim:}}{\qed\medskip}
\newenvironment{proof_of_theorem_ref}[1]{\noindent{\bf Proof of \theoref{#1}:}}{\hfill\qed\bigskip}
\newenvironment{proof_of_claim_ref}[1]{\noindent{\bf Proof of \claref{#1}:}}{\qed\medskip}

\newcommand{\eqnslab}[1]{\label{eqn:#1}}
\newcommand{\figlab}[1]{\label{fig:#1}}
\newcommand{\factlab}[1]{\label{fact:#1}}
\newcommand{\proplab}[1]{\label{prop:#1}}
\newcommand{\lemlab}[1]{\label{lemma:#1}}
\newcommand{\theolab}[1]{\label{theo:#1}}
\newcommand{\corlab}[1]{\label{cor:#1}}
\newcommand{\seclab}[1]{\label{sec:#1}}
\newcommand{\subseclab}[1]{\label{subsec:#1}}
\newcommand{\clalab}[1]{\label{claim:#1}}
\newcommand{\deflab}[1]{\label{definition:#1}}
\newcommand{\exlab}[1]{\label{ex:#1}}

\newcommand{\eqnsref}[1]{Equation~\ref{eqn:#1}}
\newcommand{\figref}[1]{Figure~\ref{fig:#1}}
\newcommand{\propref}[1]{Proposition~\ref{prop:#1}}
\newcommand{\factref}[1]{Fact~\ref{fact:#1}}
\newcommand{\lemref}[1]{Lemma~\ref{lemma:#1}}
\newcommand{\theoref}[1]{Theorem~\ref{theo:#1}}
\newcommand{\corref}[1]{Corollary~\ref{cor:#1}}
\newcommand{\secref}[1]{Section~\ref{sec:#1}}
\newcommand{\subsecref}[1]{Section~\ref{subsec:#1}}
\newcommand{\remref}[1]{Remark~\ref{rem:#1}}
\newcommand{\defref}[1]{Definition~\ref{definition:#1}}
\newcommand{\exref}[1]{Example~\ref{ex:#1}}
\newcommand{\claref}[1]{Claim~\ref{claim:#1}}


