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%  mathenv.tex  math environments  version 0.00
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\usepackage{ifthen}

\theoremstyle{plain}
\newtheorem{thm}{Theorem}[section]
\newtheorem{cor}[thm]{Corollary}
\newtheorem{lem}[thm]{Lemma}
\newtheorem{prop}[thm]{Proposition}
\newtheorem{ax}[thm]{Axiom}
\newtheorem*{thm*}{Theorem}
\newtheorem*{cor*}{Corollary}
\newtheorem*{lem*}{Lemma}
\newtheorem*{prop*}{Proposition}
\newtheorem*{ax*}{Axiom}

\theoremstyle{definition}
\newtheorem{defn}[thm]{Definition}
\newtheorem{problem}{Problem}
\newtheorem*{defn*}{Definition}
\newtheorem*{problem*}{Problem}

\theoremstyle{remark}
\newtheorem{rem}[thm]{Remark}
\newtheorem{ex}[thm]{Example}
\newtheorem{exs}[thm]{Examples}
\newtheorem*{rem*}{Remark}
\newtheorem*{ex*}{Example}
\newtheorem*{exs*}{Examples}
\newtheorem*{hoop}{Hooptedoodle}

\numberwithin{equation}{section}

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%
%\newenvironment{problem}[1][]
% {\noindent{\bf#1.\ }}
% {}
%
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\newenvironment{answer}[1][Answer]
  {\begin{proof}[#1]}
  {\renewcommand{\qedsymbol}{}\end{proof}}

\newenvironment{solution}[1][Solution]
  {\begin{proof}[#1]}
  {\renewcommand{\qedsymbol}{\ensuremath{\Diamond}}\end{proof}}

\newcounter{ppart}
\newenvironment{parts}
 {\begin{list}{\textup(\alph{ppart}\textup)\hfill}
   {\usecounter{ppart}
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    \setlength{\leftmargin}{0cm} 
    \setlength{\rightmargin}{0cm}
    \setlength{\itemindent}{2em}
    \setlength{\labelsep}{\itemindent}
    \addtolength{\labelsep}{-\labelwidth}
    \renewcommand{\makelabel}[1]{\ifthenelse
     {\equal{##1}{}}
     {\textup{(\alph{ppart})}\hfill}
     {\textup{##1}\hfill}}
   }
 }
 {\end{list}}

\renewcommand{\labelenumi}{(\roman{enumi})}

\newcommand{\secref}[1]{Section~\textup{\ref{#1}}}
\newcommand{\thmref}[1]{Theorem~\textup{\ref{#1}}}
\newcommand{\corref}[1]{Corollary~\textup{\ref{#1}}}
\newcommand{\lemref}[1]{Lemma~\textup{\ref{#1}}}
\newcommand{\propref}[1]{Proposition~\textup{\ref{#1}}}
\newcommand{\defnref}[1]{Definition~\textup{\ref{#1}}}
\newcommand{\remref}[1]{Remark~\textup{\ref{#1}}}
\newcommand{\exref}[1]{Example~\textup{\ref{#1}}}
\newcommand{\exsref}[1]{Examples~\textup{\ref{#1}}}
\newcommand{\axref}[1]{Axiom~\textup{\ref{#1}}}
\newcommand{\itemref}[1]{\textup{{\ref{#1}}}}

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