%%% ====================================================================
%%%  @LaTeX-style-file{
%%%     author          = "Nico Verwer",
%%%     version         = "1.3",
%%%     date            = "27 January 1993",
%%%     filename        = "newthm.sty",
%%%     address         = "Dept. of Computer Science
%%%                        Rijksuniversiteit te Utrecht
%%%                        P.O. box 80.089
%%%                        3508 TB Utrecht
%%%                        the Netherlands",
%%%     telephone       = "+31 30 533921",
%%%     FAX             = "+31 30 513791",
%%%     email           = "nico@cs.ruu.nl (Internet)",
%%%     codetable       = "ISO/ASCII",
%%%     keywords        = "LaTeX, theorems",
%%%     supported       = "yes",
%%%     docstring       = "LaTeX document-style option for customizing
%%%                        theorem-like environments.
%%%                        Successor of rmthm.sty.",
%%%  }
%%% ====================================================================
% How to customize the theorem-like environments that you define with
% \newtheorem (LaTeX book p. 58).
% 1. \renewcommand{\theoremstyle}{...}
%    Changes the style in which your \newtheorems are typeset.
%    Default is \rm (\it in LaTeX).
% 2. \renewcommand{\theoremopening}[2]{...}
%    \renewcommand{\namedtheoremopening}[3]{...}
%    The first variant defines the opening of the theorem.
%    Its arguments are #1 : theorem label, #2 : number.
%    The second variant defines the opening in the presence of an
%    optional argument (like \begin{guess}[Fermat]).
%    Its arguments are #1 : theorem label, #2 : number, #3 : name.
%    Defaults are as in the LaTeX book. 
% 3. \renewcommand{\theoremclosing}{...}
%    Specifies an end-of-theorem marker.
%    Default is a box flushed right.
% 4. \newtheorem{thm}[nonumthm]{Thm}
%    Defines Thm to be a theorem-like environment that is not numbered.

% Don't load twice.
\ifx\theoremstyle\undefined\else\endinput\fi

\def\@begintheorem#1#2{\theoremstyle
                       \trivlist\item[\theoremopening{#1}{#2}]}
\def\@opargbegintheorem#1#2#3{\theoremstyle 
                       \trivlist\item[\namedtheoremopening{#1}{#2}{#3}]}
\def\@endtheorem{\nopagebreak\theoremclosing\endtrivlist}

% Defaults:
\def\theoremstyle{\rm}
\def\theoremopening#1#2{\hskip\labelsep{\bf #1\ #2}}
\def\namedtheoremopening#1#2#3{\hskip\labelsep{\bf #1\ #2\ (#3)}}
\def\theoremclosing{\ifvmode\vbox{$\Box$}\else\newline$\Box$\par\fi}

\newtheorem{nonumthm}{\relax}
\renewcommand{\thenonumthm}{\relax}

\endinput