pagesetup.sty

\usepackage{amsfonts,graphicx}
\usepackage{amsfonts,latexsym,amsthm,amssymb,amsmath,euscript}
\usepackage{mathrsfs,manfnt,enumitem,stmaryrd}
\usepackage[colorlinks=true,linkcolor=blue,urlcolor=blue]{hyperref}
\usepackage{graphics}
\usepackage{placeins}
\usepackage{tikz}
\usetikzlibrary{bayesnet}
\usetikzlibrary{calc, arrows.meta, positioning}

% Use these for theorems, lemmas, proofs, etc.
\newtheorem{proposition}{Proposition}
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{conjecture}[theorem]{Conjecture}
\newtheorem{postulate}[theorem]{Postulate}
\theoremstyle{definition}
\newtheorem{example}[theorem]{Example}

\theoremstyle{remark}
\newtheorem*{remark}{Remark}
\newtheorem*{notation}{Notation}
\newtheorem*{note}{Note}

\newtheorem{exercise}{Exercise}
% \newcommand{\exinline}[1]{(\refstepcounter{exercise}Exercise~\theexercise\label{#1})}

% since we're using the custom \lecture definition, we want to recenter around that
\setcounter{tocdepth}{1}
\newcounter{lecnum}
\renewcommand{\thesubsection}{\thelecnum.\arabic{subsection}}
\renewcommand{\theequation}{\thelecnum.\arabic{equation}}
\renewcommand{\thefigure}{\thelecnum.\arabic{figure}}
\renewcommand{\thetable}{\thelecnum.\arabic{table}}

% the following macro is used to generate the header.
\newcommand{\lecture}[5]{
   \addcontentsline{toc}{section}{#5}
   \thispagestyle{plain}
   \newpage
   \setcounter{lecnum}{#1}
   \setcounter{subsection}{0}
   \setcounter{exercise}{0}
   % \renewcounter{exercise}[lecnum] % Reset counter every chapter
   \renewcommand{\theexercise}{\thelecnum.\arabic{exercise}}%
   \noindent
   \begin{center}
   \framebox{
      \vbox{\vspace{2mm}
    \hbox to 6.28in { {\bf CS281: Advanced ML
  \hfill #2, 2017} }
       \vspace{4mm}
       \hbox to 6.28in { {\Large \hfill Lecture #1: #5  \hfill} }
       \vspace{2mm}
       \hbox to 6.28in { {\it Lecturer: #3 \hfill Scribes: #4} }
      \vspace{2mm}}
   }
   \end{center}
   \markboth{Lecture #1: #5}{Lecture #1: #5}
}

%Use this command for a figure; it puts a figure in wherever you want it.
%usage: \fig{NUMBER}{SPACE-IN-INCHES}{CAPTION}
\newcommand{\fig}[3]{
			\vspace{#2}
			\begin{center}
			Figure \thelecnum.#1:~#3
			\end{center}
	}

%
% Put custom commands for lectures here
%
\newcommand{\E}{\mathbb{E}}
\newcommand{\R}{\mathbb{R}}
\newcommand{\cov}{\text{cov}}
\renewcommand{\v}[1]{\boldsymbol{#1}}
\newcommand{\on}{\operatorname}
\newcommand{\N}{\mathcal{N}}
% \newcommand{\exp}{\on{exp}}

\setlength{\parindent}{0em}
\usepackage{tikz}
\def\checkmark{\tikz\fill[scale=0.4](0,.35) -- (.25,0) -- (1,.7) -- (.25,.15) -- cycle;}
\def\crossmark{\tikz\fill[scale=0.4](0.01,0) -- (0,0.01) -- (.45,.5) -- (0,0.99) -- (0.01,1) -- (.5,.55) -- (0.99,1) -- (1,0.99) -- (0.55,0.5) -- (1,0.01) -- (0.99,0) -- (0.5,0.45) -- cycle;}
\newcommand\encirc[1]{%
  \tikz[baseline=(X.base)]
    \node (X) [draw, shape=circle, inner sep=0] {\strut #1};}
\usepackage{cancel}
\newcommand\encircshaded[1]{%
  \tikz[baseline=(X.base)]
    \node (X) [draw, shape=circle, inner sep=0, shade] {\strut #1};}
\usepackage{cancel}


\newcommand{\pa}{\text{pa}}
\newcommand{\ch}{\text{ch}}
\newcommand{\bel}{\text{bel}}
\newcommand{\m}{\text{m}}
\newcommand{\nbr}{\text{nbr}}

\newcommand{\nc}{\newcommand}

\nc{\DMO}{\DeclareMathOperator}
\DMO{\id}{id}
\DMO{\rk}{rank}
\DMO{\sgn}{sgn}
\DMO{\alt}{Alt}
\DMO{\len}{len}
\DMO{\im}{img}
\DMO{\tr}{tr}

\nc{\trm}{\textrm}

% partial derivatives
\nc{\p}[2]{\frac{\partial #1}{\partial #2}}
\nc{\der}[2]{\frac{d #1}{d #2}}
\nc{\dd}[2]{\frac{d^2 #1}{d #2 ^2}}
\nc{\pp}[2]{\frac{\partial^2 {#1}} {\partial {#2} ^2}}
\nc{\pmix}[3]{\frac{\partial^2 {#1}}{\partial {#2} \, \partial {#3}}}
\nc{\rd}{\trm{d}}
\nc{\va}[2]{\frac{\del #1}{\del #2}}

\nc{\f}{\frac}

% probability / expectation / variance
\nc{\Prob}{\mathds{P}}
\nc{\Var}{\trm{Var}}
\nc{\Cov}{\trm{Cov}}
\nc{\Cor}{\trm{Cor}}

\nc{\St}{\mathds{S}}

% important math symbols
\nc{\too}{\longrightarrow}
\nc{\rez}{\Rightarrow}
\nc{\bs}{\ensuremath{\blacksquare}}
\nc{\done}{\hfill\bs}
\nc{\bsh}{\backslash}
\nc{\w}{\wedge}
\nc{\til}{\tilde}
\nc{\xra}{\xrightarrow}
\nc{\xrez}{\xRightarrow}
\nc{\xle}{\xlongequal}

\nc{\union}{\bigcup}
\nc{\intt}{\bigcap}

\nc{\x}{\times}
\nc{\ox}{\otimes}
\nc{\op}{\oplus}

\nc{\floor}[1]{\left\lfloor {#1} \right\rfloor}
\nc{\ceil}[1]{\left\lceil {#1} \right\rceil}

% greek letters
\nc{\al}{\alpha}
\nc{\be}{\beta}
\nc{\eps}{\varepsilon}
\nc{\del}{\delta}
\nc{\D}{\Delta}
\nc{\Del}{\nabla}
\nc{\ph}{\varphi}
\nc{\Lam}{\Lambda}
\nc{\lam}{\lambda}
\nc{\G}{\Gamma}
\nc{\g}{\gamma}
\nc{\sig}{\sigma}
\nc{\tta}{\theta}
\nc{\Tta}{\Theta}
\nc{\kap}{\kappa}
\nc{\om}{\omega}

\nc{\lie}{\pounds}

\nc{\contr}{%
\begin{tikzpicture}[rotate=45,x=0.5ex,y=0.5ex]
\draw[line width=.2ex] (0,2) -- (3,2) (0,1) -- (3,1) (1,3) -- (1,0) (2,3) -- (2,0);
\end{tikzpicture}
}

\usetikzlibrary{automata,chains}