\ProvidesPackage{custom}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{latexsym}
%%\usepackage{beton}
%%euler does the C used in cauchy sequences
%\usepackage[mathbf]{euler}
%\usepackage{euler}
%\usepackage{pstcol}
\usepackage{pstricks}
\usepackage{mathrsfs}%Added by NPML needed for \mathscr
\def\T{{\mathbb{T}}}
\def\C{{\mathbb{C}}}
\def\E{{\mathbb{E}}}
\def\R{{\mathbb{R}}}
\def\Q{{\mathbb{Q}}}
\def\Qp{{\mathbb{Q}_p}}
\def\Qx{{\mathbb{Q}^\times}}
\def\Qpx{{\mathbb{Q}^\times_p}}
\def\Z{{\mathbb{Z}}}
\def\N{{\mathbb{N}}}
\def\A{{\mathbb{A}}}
\def\ip#1#2{\langle{#1},{#2}\rangle}
\def\mmod#1{\allowbreak\mkern6mu({\rm mod}\,\,{#1})}
%\renewcommand{\emptyset}{\varnothing}
\def\pf{\emph{Proof.} }
\def\proj{\mathrm{proj}}
\def\det{\mathrm{det}}
\def\Aut{\mathrm{Aut}}
\def\Inn{\mathrm{Inn}}

\usepackage{amsmath}

%\AtBeginDocument
%  {\DeclareFontShape\encodingdefault{ccr}{bx}{n}{<->sub*cmss/sbc/n}{}%
 %  \DeclareFontShape\encodingdefault{ccr}{bx}{it}{<->sub*cmss/sbc/it}{}%
 %  \DeclareFontShape\encodingdefault{ccr}{bx}{sl}{<->sub*cmss/sbc/sl}{}%
  % \DeclareFontShape\encodingdefault{ccr}{bx}{sc}{<->sub*cmss/sbc/sc}{}}
%\def\GL{{\mathop{\operator@font GL}\nolimits}}
\def\GL{GL}
\def\SL{SL}
%\def\SL{{\mathop{\operator@font SL}\nolimits}}
\def\U{{\mathop{\operator@font U}\nolimits}}
\def\SU{{\mathop{\operator@font SU}\nolimits}}
\def\O{{\mathop{\operator@font O}\nolimits}}
\def\SO{{\mathop{\operator@font SO}\nolimits}}
\def\fM{{\mathfrak{M}}}
\def\sP{{\mathscr{P}}}
\def\sS{{\mathscr{S}}}
\def\sd{\mathbin{\triangle}}
\def\sF{\mathscr{F}}
\def\Aone{(\textsf{A}1)}
\def\Atwo{(\textsf{A}2)}
\def\Athree{(\textsf{A}3)}
\def\Afour{(\textsf{A}4)}
\def\Afive{(\textsf{A}5)}
\def\Mone{(\textsf{M}1)}
\def\Mtwo{(\textsf{M}2)}
\def\Mthree{(\textsf{M}3)}
\def\Mfour{(\textsf{M}4)}
\def\Mfive{(\textsf{M}5)}
\def\Done{(\textsf{D})}
\def\Cone{(\textsf{C})}
\def\Oone{(\textsf{O}1)}
\def\Otwo{(\textsf{O}2)}
\def\Othree{(\textsf{O}3)}
\def\Ofour{(\textsf{O}4)}
\def\Pset{\mathcal P}
\def\im{\mathrm{Im}}
\def\diam{\mathrm{diam}}
\def\Sym{\mathrm{Sym}}
\def\lub{\mathrm{lub}}
\def\glb{\mathrm{glb}}
\def\supp{\mathrm{supp}}
\def\Arg{\mathrm{Arg}}
\newtheorem{challenge}{Challenge}[chapter]
\newtheorem{theorem}{Theorem}[section]
\newtheorem{proposition}[theorem]{Proposition}
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{definitions}[theorem]{Definitions}
\newtheorem{definition}[theorem]{Definition}
\newtheorem{exercise}[theorem]{Exercise}
\newtheorem{exercises}[theorem]{Exercise}
\newtheorem{problem}[challenge]{Problem}
\newtheorem{challengep}{Challenge Problems}
\newtheorem{example}[theorem]{Example}
\newtheorem{examples}[theorem]{Examples}
\newtheorem{moreexamples}[theorem]{More Examples}
\newtheorem{remark}[theorem]{Remark}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{adventure}[theorem]{Adventure}
\newtheorem{hidden_project}{\raggedright\bfseries\Large %
Project}[chapter]
%\newtheorem{generic}[theorem]{}
\newtheorem{fact}[theorem]{Fact}
\newtheorem{facts}[theorem]{Facts}
\renewcommand{\thechallengep}{\Roman{challengep}}
\newcommand{\notation}{\noindent{\bfseries Notation}}


\newenvironment{generic}[1]{\stepcounter{theorem}%
  {\raggedright{\bfseries #1\ \,\thetheorem\ }}}{}
\newenvironment{defenm}[0]{\renewcommand{\theenumi}{\alph{enumi}}%
  \begin{enumerate}}{\end{enumerate}}
\newenvironment{exerenm}[0]{\renewcommand{\theenumi}{{\itshape\roman{enumi}}}%
  \begin{enumerate}}{\end{enumerate}}
\newenvironment{examenm}[0]{\renewcommand{\theenumi}{{\itshape\roman{enumi}}}%
  \begin{enumerate}}{\end{enumerate}}
\newenvironment{thmenm}[0]{\renewcommand{\theenumi}{{\itshape\roman{enumi}}}%
  \begin{enumerate}}{\end{enumerate}}
\def\challenge{{\large\noindent \bfseries
  Challenge Problems: \Roman{chapter}\\}}
\def\cl{{\mathop{\operator@font cl}\nolimits}}
\def\comp#1{^c \! #1}
\def\card#1{^\# #1}
\def\ord{{\mathop{\operator@font ord}\nolimits}}
\def\normal{\vartriangleleft}
\newcommand{\set}[2]{\ensuremath{\{ #1\ |\ #2 \}}}
\renewcommand\subsection{\@startsection{subsection}{2}{\z@}%
                          {3.25ex \@plus1ex \@minus.2ex}%
                          {\z@}%
                          {\normalfont\normalsize\bfseries}}
\def\@begintheorem#1#2{\trivlist
  \item[\hskip \labelsep{\bfseries #1\ #2\ }]}
\def\@opargbegintheorem#1#2#3{\trivlist
  \item[\hskip \labelsep{\bfseries #1\ #2\ (#3)}]}
\let\defn=\emph
\let\epsilon=\varepsilon
\def\idm{\mathbf{1}}
\def\Hom{{\mathop{\operator@font Hom}\nolimits}}
\def\sgn{{\mathop{\operator@font sgn}\nolimits}}
\let\dd=\partial
\def\mat#1#2#3#4{\left(\begin{array}{cc} #1 & #2 \\ #3 & #4 \end{array}\right)}
%\def\endpf{\hfill\includegraphics*{sally.head.ps} \bigskip}
\def\endpf{\hfill$\blacksquare$}
\newcounter{countproj}[chapter]
\newcommand{\project}[1]{%
{\begin{hidden_project} \raggedright\bfseries\Large -\  #1 \end{hidden_project}}\bigskip}
\newcommand{\chquote}[2]{{\vspace{-5mm}\hfill\parbox{8cm}{\small\itshape #1}%

  \hfill\itshape\small -- #2} \\}
%%some hack fixes to avoid euler
\def\scr#1{{\mathcal{ #1}}}
\@addtoreset{theorem}{chapter}
\renewcommand{\Re}{\ensuremath{\mathrm{Re}}}
\renewcommand{\Im}{\ensuremath{\mathrm{Im}}}

%\newcommand\project{\@startsection*{subsection}{2}{\z@}%
%                          {3.25ex \@plus1ex \@minus.2ex}%
%                          {\z@ \@plus10ex}%
%                          {\Large\bfseries}}[Project]