% the packages i need

\usepackage{latexsym}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amsthm}
\usepackage{amssymb}
\usepackage{url}
\usepackage{psfig}

% mathcal letters
\newcommand{\cA}{\mathcal{A}}
\newcommand{\cB}{\mathcal{B}}
\newcommand{\cC}{\mathcal{C}}
\newcommand{\cD}{\mathcal{D}}
\newcommand{\cE}{\mathcal{E}}
\newcommand{\cF}{\mathcal{F}}
\newcommand{\cG}{\mathcal{G}}
\newcommand{\cH}{\mathcal{H}}
\newcommand{\cI}{\mathcal{I}}
\newcommand{\cJ}{\mathcal{J}}
\newcommand{\cK}{\mathcal{K}}
\newcommand{\cL}{\mathcal{L}}
\newcommand{\cM}{\mathcal{M}}
\newcommand{\cN}{\mathcal{N}}
\newcommand{\cO}{\mathcal{O}}
\newcommand{\cP}{\mathcal{P}}
\newcommand{\cQ}{\mathcal{Q}}
\newcommand{\cR}{\mathcal{R}}
\newcommand{\cS}{\mathcal{S}}
\newcommand{\cT}{\mathcal{T}}
\newcommand{\cU}{\mathcal{U}}
\newcommand{\cV}{\mathcal{V}}
\newcommand{\cW}{\mathcal{W}}
\newcommand{\cX}{\mathcal{X}}
\newcommand{\cY}{\mathcal{Y}}
\newcommand{\cZ}{\mathcal{Z}}

% greek letters
\newcommand{\al}{\alpha}
\newcommand{\be}{\beta}
\newcommand{\ga}{\gamma}
\newcommand{\de}{\delta}
\newcommand{\ep}{\epsilon}
\newcommand{\ze}{\zeta}
\newcommand{\et}{\eta}
\renewcommand{\th}{\theta}
\newcommand{\io}{\iota}
\newcommand{\ka}{\kappa}
\newcommand{\la}{\lambda}
\newcommand{\rh}{\rho}
\newcommand{\si}{\sigma}
\newcommand{\ta}{\tau}
\newcommand{\up}{\upsilon}
\newcommand{\ph}{\phi}
\newcommand{\ch}{\chi}
\newcommand{\ps}{\psi}
\newcommand{\om}{\ometa}
\newcommand{\Ga}{\Gamma}
\newcommand{\De}{\Delta}
\newcommand{\Th}{\Theta}
\newcommand{\La}{\Lambda}
\newcommand{\Si}{\Sigma}
\newcommand{\Up}{\Upsilon}
\newcommand{\Ph}{\Phi}
\newcommand{\Ps}{\Psi}
\newcommand{\Om}{\Omega}

\renewcommand{\digamma}{\Psi}


% some definitions
%\newcommand{\defeq}{=^{\hspace{-2.9mm}\textsf{\tiny def}}}
\newcommand{\defeq}{\triangleq}
\newcommand{\order}{\cO}
\newcommand{\ud}{\textrm{d}}
\renewcommand{\|}{\textrm{~}\arrowvert\textrm{~}}
\newcommand{\dbar}{\textrm{~}\arrowvert\arrowvert\textrm{~}}
\newcommand{\bars}{\textrm{~}\arrowvert\arrowvert\textrm{~}}
\renewcommand{\;}{\textrm{~}{\boldsymbol ;}\textrm{~}}
\newcommand{\by}{\sim}
\newcommand{\impl}{\Longrightarrow}
\newcommand{\fto}{\rightarrow}
\newcommand{\from}{\leftarrow}
\newcommand{\restricted}{\upharpoonright}
\newcommand{\inv}{^{-1}}
\newcommand{\pinv}{^{\dagger}}
\renewcommand{\brack}[1]{\left\{\begin{array}{ll}#1\end{array}\right.}
\renewcommand{\vec}[1]{\boldsymbol{#1}}
\newcommand{\mat}[1]{\text{\bf #1}}
\newcommand{\missing}{\bullet}
\newcommand{\T}{{}^\top}
\newcommand{\TT}{^\top}
%\newcommand{\inv}{{}^{-1}}
\newcommand{\prop}{\varpropto}
\newcommand{\norm}[1]{\left\vert\left\vert #1 \right\vert\right\vert}
%\newcommand{\card}[1]{\left\vert #1 \right\vert}


\newcommand{\p}[1]{p\left(#1\right)}
\newcommand{\pprime}[1]{p'\left(#1\right)}
\newcommand{\pleft}[1]{p\left(#1\right.}
\newcommand{\pright}[1]{p\left.#1\right)}

\newcommand{\prob}[1]{\mathcal{P}\left\{{#1}\right\}}

% for hierarchical models
\newenvironment{hierarchical}
  {\begin{equation}%
   \begin{array}{r@{\|}l@{~\by~}l}}
  {\end{array}%
   \end{equation}}

\newenvironment{hierarchicalnocond}
  {\begin{equation}%
   \begin{array}{r@{~\by~}l}}
  {\end{array}%
   \end{equation}}

\newenvironment{hierarchical2col}
  {\begin{equation}%
   \begin{array}{r@{\|}l@{~\by~}l@{~~~}r@{\|}l@{~\by~}l}}
  {\end{array}%
   \end{equation}}


% indicator variable
\newcommand{\Ind}{\boldsymbol{1}}

\renewcommand{\(}{\left(}
\renewcommand{\)}{\right)}

% some useful spaces
\newcommand{\X}{\mathcal{X}}
\newcommand{\R}{\mathbb{R}}
\newcommand{\Z}{\mathbb{Z}}
\newcommand{\Rplus}{\R^{+}}
\newcommand{\N}{\mathbb{N}}
\newcommand{\Q}{\mathbb{Q}}
\newcommand{\Sbb}{\mathbb{S}}
\renewcommand{\H}{\mathcal{H}}

\newcommand{\without}{\backslash}

% sets/functions
\newcommand{\dom}{\textrm{dom}}
\newcommand{\ran}{\textrm{ran}}
\newcommand{\sgn}{\textrm{sgn}}
\newcommand{\sign}{\textrm{sign}}

% distributions
%% \newcommand{\Nor}{\mathcal{N}}
%% \newcommand{\Gam}{\mathcal{G}}
%% \newcommand{\Dir}{\mathcal{D}}
%% \newcommand{\Exp}{\mathcal{E}}
%% \newcommand{\Mult}{\mathcal{M}}
%% \newcommand{\Stu}{\mathfrak{t}}
%% \newcommand{\Bet}{\mathcal{B}}

\newcommand{\Uni}{\mathcal{U}\hspace{-0.5mm}\textit{ni}}
\newcommand{\Nor}{\mathcal{N}\hspace{-0.5mm}\textit{or}}
\newcommand{\Gam}{\mathcal{G}\hspace{-0.5mm}\textit{am}}
\newcommand{\Dir}{\mathcal{D}\hspace{-0.5mm}\textit{ir}}
\newcommand{\PY}{\mathcal{P}\mathcal{Y}}
\newcommand{\Exp}{\mathcal{E}\hspace{-0.5mm}\textit{xp}}
\newcommand{\Mult}{\mathcal{M}\hspace{-0.5mm}\textit{ult}}
\newcommand{\Stu}{\mathcal{S}\hspace{-0.5mm}\textit{tu}}
\newcommand{\Bet}{\mathcal{B}\hspace{-0.5mm}\textit{et}}
\newcommand{\Bin}{\mathcal{B}\hspace{-0.5mm}\textit{in}}
\newcommand{\Ber}{\mathcal{B}\hspace{-0.5mm}\textit{er}}
\newcommand{\Wish}{\mathcal{W}\hspace{-0.5mm}\textit{ish}}
\newcommand{\Disc}{\mathcal{D}\hspace{-0.5mm}\textit{isc}}
\newcommand{\IW}{\mathcal{IW}}

\newcommand{\DP}{\mathcal{DP}}
\newcommand{\Poi}{\mathcal{P}\hspace{-0.5mm}\textit{oi}}

% expectations, variances, etc.
\newcommand{\Ep}{\mathbb{E}}
\newcommand{\Var}{\mathbb{V}}
\newcommand{\KL}{\textrm{KL}}
\newcommand{\divr}{\vert\vert}

% complexity
\renewcommand{\O}{\mathcal{O}}

% min, max
\def\argmax{\qopname\relax n{argmax}}
\def\argmin{\qopname\relax n{argmin}}

\def\Tr{\qopname\relax n{Tr}}

\def\abs{\qopname\relax n{abs}}
\newcommand{\ab}[1]{\left\vert #1 \right\vert}
\newcommand{\card}[1]{\left\vert #1 \right\vert}

\def\tr{\qopname\relax n{tr}}
\def\diag{\qopname\relax n{diag}}

% gradient
\newcommand{\grad}{\nabla}

% notes and warnings
\newenvironment{mynote}
  {\par\linespread{1}\center%
   \begin{tabular}{|p{4in}|}%
     \hline\vspace{+0.02in}%
     \rule{1ex}{1ex} NOTE \rule{1ex}{1ex}%
     }
  { \vspace{+0.05in}\\\hline%
   \end{tabular}\vspace{+0.1in}\\}

\newenvironment{mywarn}
  {\par\linespread{1}\center%
   \begin{tabular}{|p{4in}|}%
     \hline\vspace{+0.02in}%
     \rule{1ex}{1ex} WARNING \rule{1ex}{1ex}%
     }
  { \vspace{+0.05in}\\\hline%
   \end{tabular}\vspace{+0.1in}\\}


\allowdisplaybreaks[3]

\newcommand{\TODO}{{\bf TODO\dots}}

% change page size
\newcommand{\widenpage}{%
  \addtolength{\hoffset}{-5mm}%
  \addtolength{\textwidth}{10mm}%
  }

\newcommand{\lengthenpage}{%
  \addtolength{\voffset}{-5mm}%
  \addtolength{\textheight}{10mm}%
  }

\newcommand{\margin}[1]{\-\mbox{}\marginpar[\hspace{1pt}\raggedright\small\sf #1]{\hspace{1pt}\raggedleft\small\sf #1}}
\newcommand{\marginuse}[1]{{\bf #1}\margin{#1}}

\newcommand{\marginr}[1]{\-\mbox{}\marginpar[\hspace{1pt}\raggedright\small\sf #1]{\hspace{1pt}\raggedright\small\sf #1}}
\newcommand{\marginruse}[1]{{\bf #1}\marginr{#1}}


\newtheorem{mytheorem}{Theorem}
\newtheorem{myproposition}{Proposition}
\newtheorem{mydefinition}{Definition}
\newtheorem{mycorollary}{Corollary}
\newtheorem{myexample}{Example}
\newtheorem{myexercise}{Exercise}


\makeatletter
\def\url@leostyle{%
  \@ifundefined{selectfont}{\def\UrlFont{\sf}}{\def\UrlFont{\small\ttfamily}}}
\makeatother
\urlstyle{leo}