mdw@git.distorted.org.uk Git - mdwtools/blob - mdwthm.dtx

   1 % \begin{meta-comment}
   2 %
   3 % $Id: mdwthm.dtx,v 1.1 2002/02/03 20:49:03 mdw Exp $
   4 %
   5 % Standard theorem typesetting
   6 %
   7 % (c) 2001 Mark Wooding
   8 %
   9 %----- Revision history -----------------------------------------------------
  10 %
  11 % $Log: mdwthm.dtx,v $
  12 % Revision 1.1  2002/02/03 20:49:03  mdw
  13 % Checkin for new build system.
  14 %
  15 %
  16 % \end{meta-comment}
  17 %
  18 % \begin{meta-comment} <general public licence>
  19 %%
  20 %% mdwthm package -- standard theorem stuff
  21 %% Copyright (c) 2001 Mark Wooding
  22 %%
  23 %% This program is free software; you can redistribute it and/or modify
  24 %% it under the terms of the GNU General Public License as published by
  25 %% the Free Software Foundation; either version 2 of the License, or
  26 %% (at your option) any later version.
  27 %%
  28 %% This program is distributed in the hope that it will be useful,
  29 %% but WITHOUT ANY WARRANTY; without even the implied warranty of
  30 %% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  31 %% GNU General Public License for more details.
  32 %%
  33 %% You should have received a copy of the GNU General Public License
  34 %% along with this program; if not, write to the Free Software Foundation,
  35 %% Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  36 % \end{meta-comment}
  37 %
  38 % \begin{meta-comment} <Package preambles>
  39 %<+package>\NeedsTeXFormat{LaTeX2e}
  40 %<+package>\ProvidesPackage{mdwthm}
  41 %<+package>                [2001/09/16 1.0 theorem typesetting]
  42 %<+thmstyle>\ProvidesFile{mdwmargin.thm}
  43 %<+thmstyle>             [2001/09/16 1.0 numbers-in-the-margin theorem style]
  44 % \end{meta-comment}
  45 %
  46 % \CheckSum{140}
  47 %% \CharacterTable
  48 %%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
  49 %%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
  50 %%   Digits        \0\1\2\3\4\5\6\7\8\9
  51 %%   Exclamation   \!     Double quote  \"     Hash (number) \#
  52 %%   Dollar        \$     Percent       \%     Ampersand     \&
  53 %%   Acute accent  \'     Left paren    \(     Right paren   \)
  54 %%   Asterisk      \*     Plus          \+     Comma         \,
  55 %%   Minus         \-     Point         \.     Solidus       \/
  56 %%   Colon         \:     Semicolon     \;     Less than     \<
  57 %%   Equals        \=     Greater than  \>     Question mark \?
  58 %%   Commercial at \@     Left bracket  \[     Backslash     \\
  59 %%   Right bracket \]     Circumflex    \^     Underscore    \_
  60 %%   Grave accent  \`     Left brace    \{     Vertical bar  \|
  61 %%   Right brace   \}     Tilde         \~}
  62 %%
  63 %
  64 % \begin{meta-comment}
  65 %
  66 %<*driver>
  67 \input{mdwtools}
  68 \describespackage{mdwthm}
  69 \mdwdoc
  70 %</driver>
  71 %
  72 % \end{meta-comment}
  73 %
  74 %^^A-------------------------------------------------------------------------
  75 % \section{User guide}
  76 %
  77 % \subsection{Environments provided}
  78 %
  79 % \DescribeEnv{theorem}
  80 % \DescribeEnv{lemma}
  81 % \DescribeEnv{proposition}
  82 % \DescribeEnv{corollary}
  83 % \DescribeEnv{definition}
  84 % \DescribeEnv{example}
  85 % \DescribeEnv{fact}
  86 % \DescribeEnv{remark}
  87 % \DescribeEnv{note}
  88 % The package defines a collection of theorem environments, declared in the
  89 % usual way.  All of them except \env{claim} share the same counter.  If the
  90 % document class has a |\chapter| command, then they are numbered within the
  91 % chapter; otherwise there is a single numbering system throughout the
  92 % document.
  93 %
  94 % Every environment has a $*$-version, which doesn't print a number.  This
  95 % might be useful every now and then.
  96 %
  97 % The environments \env{theorem}, \env{lemma}, \env{proposition},
  98 % \env{claim}and \env{corollary} are set using the `plain' style, with the
  99 % body text in \textit{italics}.  The environments \env{definition} and
 100 % \env{example} are set in the `definition' style, with body text in roman.
 101 % The remaining environments, \env{fact}, \env{remark}, and \env{note} are
 102 % set in the `remark' style.
 103 %
 104 % \DescribeEnv{claim}
 105 % \DescribeEnv{proof}
 106 % The \env{claim} environment has its own counter, which is reset at the
 107 % beginning of the \env{proof} environment.
 108 %
 109 % \subsection{The \package{mdwmargin} style}
 110 %
 111 % This package also provides a pretty `number-hanging-in-the-margin' theorem
 112 % style collection, available under the name \env{mdwmargin}.
 113 %
 114 % \implementation
 115 %
 116 %
 117 %^^A-------------------------------------------------------------------------
 118 % \section{Implementation of the environments}
 119 %
 120 %    \begin{macrocode}
 121 %<*package>
 122 \DeclareOption*{\PassOptionsToPackage{\CurrentOption}{amsthm}}
 123 \ProcessOptions\relax
 124 \RequirePackage{amsthm}
 125 %    \end{macrocode}
 126 %
 127 % \subsection{The simple bits}
 128 %
 129 % \begin{environment}{theorem}
 130 %
 131 % Do the right thing with the numbering rules.
 132 %
 133 %    \begin{macrocode}
 134 \toks@{\newtheorem{theorem}{Theorem}}
 135 \@tempswatrue%
 136 \ifx\if@article\iftrue\@tempswafalse\fi
 137 \ifx\chapter\@@undefined\@tempswafalse\fi
 138 \if@tempswa\toks@\expandafter{\the\toks@[chapter]}\fi
 139 \the\toks@
 140 \newtheorem*{theorem*}{Theorem}
 141 %    \end{macrocode}
 142 %
 143 % \end{environment}
 144 %
 145 % \begin{environment}{lemma}
 146 % \begin{environment}{proposition}
 147 % \begin{environment}{corollary}
 148 % \begin{environment}{claim}
 149 % \begin{environment}{definition}
 150 % \begin{environment}{example}
 151 % \begin{environment}{fact}
 152 % \begin{environment}{remark}
 153 %
 154 % Most of this is very easy.
 155 %
 156 %    \begin{macrocode}
 157 \theoremstyle{plain}
 158 \newtheorem{lemma}[theorem]{Lemma}
 159 \newtheorem*{lemma*}{Lemma}
 160 \newtheorem{proposition}[theorem]{Proposition}
 161 \newtheorem*{proposition*}{Proposition}
 162 \newtheorem{corollary}[theorem]{Corollary}
 163 \newtheorem*{corollary*}{Corollary}
 164 \newtheorem{fact}[theorem]{Fact}
 165 \newtheorem*{fact*}{Fact}
 166 \newtheorem{claim}{Claim}
 167 \newtheorem*{claim*}{Claim}
 168 %    \end{macrocode}
 169 %
 170 %    \begin{macrocode}
 171 \theoremstyle{definition}
 172 \newtheorem{definition}[theorem]{Definition}
 173 \newtheorem*{definition*}{Definition}
 174 \newtheorem{example}[theorem]{Example}
 175 \newtheorem*{example*}{Example}
 176 %    \end{macrocode}
 177 %
 178 %    \begin{macrocode}
 179 \theoremstyle{remark}
 180 \newtheorem{remark}[theorem]{Remark}
 181 \newtheorem*{remark*}{Remark}
 182 %    \end{macrocode}
 183 %
 184 % \end{environment}
 185 % \end{environment}
 186 % \end{environment}
 187 % \end{environment}
 188 % \end{environment}
 189 % \end{environment}
 190 % \end{environment}
 191 % \end{environment}
 192 %
 193 % \begin{environment}{note}
 194 %
 195 % Someone else might also have a \env{note} environment.  Be careful.
 196 %
 197 %    \begin{macrocode}
 198 \ifx\note\@@undefined
 199   \newtheorem{note}[theorem]{Note}
 200   \newtheorem*{note*}{Note}
 201 \fi
 202 %    \end{macrocode}
 203 %
 204 % \end{environment}
 205 %
 206 % \begin{environment}{proof}
 207 %
 208 % Now to hack the proof environment.
 209 %
 210 %    \begin{macrocode}
 211 \renewenvironment{proof}[1][\proofname]{%
 212   \setcounter{claim}{0}%
 213   \par\normalfont%
 214   \trivlist\advance\itemindent\labelsep\let\makelabel\textit%
 215   \advance\@topsep-\parskip%
 216   \advance\@topsepadd-\parskip%
 217   \item[#1\@proofdot]%
 218 }{%
 219   \qed\endtrivlist%
 220 }
 221 \def\@proofdot{.}
 222 %    \end{macrocode}
 223 % \end{environment}
 224 %
 225 % Done.
 226 %
 227 %    \begin{macrocode}
 228 %</package>
 229 %    \end{macrocode}
 230 %
 231 %^^A-------------------------------------------------------------------------
 232 % \section{Implementation of the theorem style}
 233 %
 234 %    \begin{macrocode}
 235 %<*thmstyle>
 236 %    \end{macrocode}
 237 %
 238 % \begin{macro}{\thmhead@margin}
 239 %
 240 % Firstly, a macro to typeset the theorem environment header, with the number
 241 % in the margin.
 242 %
 243 %    \begin{macrocode}
 244 \def\thmhead@margin#1#2#3{%
 245   \thmnumber{\llap{#2{\normalsize\quad}}}%
 246   \thmname{#1}%
 247   \thmnote{ \the\thm@notefont(#3)}%
 248 }
 249 %    \end{macrocode}
 250 % \end{macro}
 251 %
 252 % \begin{macro}{\thm@headfont@margin}
 253 %
 254 % Now to decide on the header font.  Definitely we want boldface; if the
 255 % documentclass (or \package{mdwfonts}) has decided on a different font
 256 % family for the headings, then we use that.
 257 %
 258 %    \begin{macrocode}
 259 \def\thm@headfont@margin{%
 260   \fontseries{b}%
 261   \ifx\headdefault\@@undfined\else\fontfamily\headdefault\fi%
 262   \selectfont%
 263 }
 264 %    \end{macrocode}
 265 % \end{macro}
 266 %
 267 % \begin{macro}{\qedsymbol}
 268 %
 269 % Use the nice symbol if available.
 270 %
 271 %    \begin{macrocode}
 272 \AtBeginDocument{\ifx\square\@@undefined\else\def\qedsymbol{$\square$}\fi}
 273 %    \end{macrocode}
 274 % \end{macro}
 275 %
 276 % \begin{macro}{\hack@thm}
 277 %
 278 % Now we hack the standard theorem styles to do what we want.  This is a
 279 % tedious enough game with |\expandafter|.
 280 %
 281 %    \begin{macrocode}
 282 \def\hack@thm#1#2{%
 283   \expandafter\def\expandafter#1\expandafter{#1%
 284     \let\thmhead\thmhead@margin%
 285     \thm@headfont{\thm@headfont@margin}%
 286     \thm@headpunct{}%
 287     \advance\thm@postskip-\parskip%
 288     \def\after@thm{#2}%
 289   }
 290 }
 291 \def\@endtheorem{\after@thm\endtrivlist\@endpefalse}
 292 \let\@proofdot\relax
 293 \hack@thm\th@plain{}
 294 \hack@thm\th@definition{\qed}
 295 \hack@thm\th@remark{\qed}
 296 %</thmstyle>
 297 %    \end{macrocode}
 298 % \end{macro}
 299 %
 300 % \hfill Mark Wooding, \today
 301 % \Finale
 302 %
 303 \endinput