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1 | % \begin{meta-comment} |
2 | % |
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3 | % $Id: mdwthm.dtx,v 1.3 2003/09/05 16:16:20 mdw Exp $ |
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4 | % |
5 | % Standard theorem typesetting |
6 | % |
7 | % (c) 2001 Mark Wooding |
8 | % |
9 | %----- Revision history ----------------------------------------------------- |
10 | % |
11 | % $Log: mdwthm.dtx,v $ |
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12 | % Revision 1.3 2003/09/05 16:16:20 mdw |
13 | % Various nips and tucks. Redefine theorem styles from scratch now. |
14 | % |
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15 | % Revision 1.2 2002/02/24 12:35:55 mdw |
16 | % Fix handling of \chapter, in case some idiot has said `\csname |
17 | % chapter\endcsname'. |
18 | % |
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19 | % Revision 1.1 2002/02/03 20:49:03 mdw |
20 | % Checkin for new build system. |
21 | % |
22 | % |
23 | % \end{meta-comment} |
24 | % |
25 | % \begin{meta-comment} <general public licence> |
26 | %% |
27 | %% mdwthm package -- standard theorem stuff |
28 | %% Copyright (c) 2001 Mark Wooding |
29 | %% |
30 | %% This program is free software; you can redistribute it and/or modify |
31 | %% it under the terms of the GNU General Public License as published by |
32 | %% the Free Software Foundation; either version 2 of the License, or |
33 | %% (at your option) any later version. |
34 | %% |
35 | %% This program is distributed in the hope that it will be useful, |
36 | %% but WITHOUT ANY WARRANTY; without even the implied warranty of |
37 | %% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
38 | %% GNU General Public License for more details. |
39 | %% |
40 | %% You should have received a copy of the GNU General Public License |
41 | %% along with this program; if not, write to the Free Software Foundation, |
42 | %% Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
43 | % \end{meta-comment} |
44 | % |
45 | % \begin{meta-comment} <Package preambles> |
46 | %<+package>\NeedsTeXFormat{LaTeX2e} |
47 | %<+package>\ProvidesPackage{mdwthm} |
48 | %<+package> [2001/09/16 1.0 theorem typesetting] |
49 | %<+thmstyle>\ProvidesFile{mdwmargin.thm} |
50 | %<+thmstyle> [2001/09/16 1.0 numbers-in-the-margin theorem style] |
51 | % \end{meta-comment} |
52 | % |
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53 | % \CheckSum{187} |
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54 | %% \CharacterTable |
55 | %% {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 |
56 | %% 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 |
57 | %% Digits \0\1\2\3\4\5\6\7\8\9 |
58 | %% Exclamation \! Double quote \" Hash (number) \# |
59 | %% Dollar \$ Percent \% Ampersand \& |
60 | %% Acute accent \' Left paren \( Right paren \) |
61 | %% Asterisk \* Plus \+ Comma \, |
62 | %% Minus \- Point \. Solidus \/ |
63 | %% Colon \: Semicolon \; Less than \< |
64 | %% Equals \= Greater than \> Question mark \? |
65 | %% Commercial at \@ Left bracket \[ Backslash \\ |
66 | %% Right bracket \] Circumflex \^ Underscore \_ |
67 | %% Grave accent \` Left brace \{ Vertical bar \| |
68 | %% Right brace \} Tilde \~} |
69 | %% |
70 | % |
71 | % \begin{meta-comment} |
72 | % |
73 | %<*driver> |
74 | \input{mdwtools} |
75 | \describespackage{mdwthm} |
76 | \mdwdoc |
77 | %</driver> |
78 | % |
79 | % \end{meta-comment} |
80 | % |
81 | %^^A------------------------------------------------------------------------- |
82 | % \section{User guide} |
83 | % |
84 | % \subsection{Environments provided} |
85 | % |
86 | % \DescribeEnv{theorem} |
87 | % \DescribeEnv{lemma} |
88 | % \DescribeEnv{proposition} |
89 | % \DescribeEnv{corollary} |
90 | % \DescribeEnv{definition} |
91 | % \DescribeEnv{example} |
92 | % \DescribeEnv{fact} |
93 | % \DescribeEnv{remark} |
94 | % \DescribeEnv{note} |
95 | % The package defines a collection of theorem environments, declared in the |
96 | % usual way. All of them except \env{claim} share the same counter. If the |
97 | % document class has a |\chapter| command, then they are numbered within the |
98 | % chapter; otherwise there is a single numbering system throughout the |
99 | % document. |
100 | % |
101 | % Every environment has a $*$-version, which doesn't print a number. This |
102 | % might be useful every now and then. |
103 | % |
104 | % The environments \env{theorem}, \env{lemma}, \env{proposition}, |
105 | % \env{claim}and \env{corollary} are set using the `plain' style, with the |
106 | % body text in \textit{italics}. The environments \env{definition} and |
107 | % \env{example} are set in the `definition' style, with body text in roman. |
108 | % The remaining environments, \env{fact}, \env{remark}, and \env{note} are |
109 | % set in the `remark' style. |
110 | % |
111 | % \DescribeEnv{claim} |
112 | % \DescribeEnv{proof} |
113 | % The \env{claim} environment has its own counter, which is reset at the |
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114 | % beginning of the \env{proof} environment. If you say |\qed| in a |
115 | % \env{proof} environment then it uses your symbol; otherwise it adds its own |
116 | % at the end. |
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117 | % |
118 | % \subsection{The \package{mdwmargin} style} |
119 | % |
120 | % This package also provides a pretty `number-hanging-in-the-margin' theorem |
121 | % style collection, available under the name \env{mdwmargin}. |
122 | % |
123 | % \implementation |
124 | % |
125 | % |
126 | %^^A------------------------------------------------------------------------- |
127 | % \section{Implementation of the environments} |
128 | % |
129 | % \begin{macrocode} |
130 | %<*package> |
131 | \DeclareOption*{\PassOptionsToPackage{\CurrentOption}{amsthm}} |
132 | \ProcessOptions\relax |
133 | \RequirePackage{amsthm} |
134 | % \end{macrocode} |
135 | % |
136 | % \subsection{The simple bits} |
137 | % |
138 | % \begin{environment}{theorem} |
139 | % |
140 | % Do the right thing with the numbering rules. |
141 | % |
142 | % \begin{macrocode} |
143 | \toks@{\newtheorem{theorem}{Theorem}} |
144 | \@tempswatrue% |
145 | \ifx\if@article\iftrue\@tempswafalse\fi |
146 | \ifx\chapter\@@undefined\@tempswafalse\fi |
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147 | \ifx\chapter\relax\@tempswafalse\fi |
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148 | \if@tempswa\toks@\expandafter{\the\toks@[chapter]}\fi |
149 | \the\toks@ |
150 | \newtheorem*{theorem*}{Theorem} |
151 | % \end{macrocode} |
152 | % |
153 | % \end{environment} |
154 | % |
155 | % \begin{environment}{lemma} |
156 | % \begin{environment}{proposition} |
157 | % \begin{environment}{corollary} |
158 | % \begin{environment}{claim} |
159 | % \begin{environment}{definition} |
160 | % \begin{environment}{example} |
161 | % \begin{environment}{fact} |
162 | % \begin{environment}{remark} |
163 | % |
164 | % Most of this is very easy. |
165 | % |
166 | % \begin{macrocode} |
167 | \theoremstyle{plain} |
168 | \newtheorem{lemma}[theorem]{Lemma} |
169 | \newtheorem*{lemma*}{Lemma} |
170 | \newtheorem{proposition}[theorem]{Proposition} |
171 | \newtheorem*{proposition*}{Proposition} |
172 | \newtheorem{corollary}[theorem]{Corollary} |
173 | \newtheorem*{corollary*}{Corollary} |
174 | \newtheorem{fact}[theorem]{Fact} |
175 | \newtheorem*{fact*}{Fact} |
176 | \newtheorem{claim}{Claim} |
177 | \newtheorem*{claim*}{Claim} |
178 | % \end{macrocode} |
179 | % |
180 | % \begin{macrocode} |
181 | \theoremstyle{definition} |
182 | \newtheorem{definition}[theorem]{Definition} |
183 | \newtheorem*{definition*}{Definition} |
184 | \newtheorem{example}[theorem]{Example} |
185 | \newtheorem*{example*}{Example} |
186 | % \end{macrocode} |
187 | % |
188 | % \begin{macrocode} |
189 | \theoremstyle{remark} |
190 | \newtheorem{remark}[theorem]{Remark} |
191 | \newtheorem*{remark*}{Remark} |
192 | % \end{macrocode} |
193 | % |
194 | % \end{environment} |
195 | % \end{environment} |
196 | % \end{environment} |
197 | % \end{environment} |
198 | % \end{environment} |
199 | % \end{environment} |
200 | % \end{environment} |
201 | % \end{environment} |
202 | % |
203 | % \begin{environment}{note} |
204 | % |
205 | % Someone else might also have a \env{note} environment. Be careful. |
206 | % |
207 | % \begin{macrocode} |
208 | \ifx\note\@@undefined |
209 | \newtheorem{note}[theorem]{Note} |
210 | \newtheorem*{note*}{Note} |
211 | \fi |
212 | % \end{macrocode} |
213 | % |
214 | % \end{environment} |
215 | % |
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216 | % \begin{macro}{\@qedhack} |
217 | % |
218 | % Make |\qed| idempotent. |
219 | % |
220 | % \begin{macrocode} |
221 | \newif\if@qedsw |
222 | \def\@qedhack{% |
223 | \let\@qed@\qed% |
224 | \global\@qedswtrue% |
225 | \def\qed{\if@qedsw\global\@qedswfalse\expandafter\@qed@\fi}% |
226 | } |
227 | % \end{macrocode} |
228 | % |
229 | % \end{macro} |
230 | % |
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231 | % \begin{environment}{proof} |
232 | % |
233 | % Now to hack the proof environment. |
234 | % |
235 | % \begin{macrocode} |
236 | \renewenvironment{proof}[1][\proofname]{% |
237 | \setcounter{claim}{0}% |
238 | \par\normalfont% |
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239 | \ifdim\topsep<\parskip\topsep\parskip\fi% |
240 | \ifdim\@topsepadd<\z@\@topsepadd\z@\fi% |
241 | \trivlist\advance\itemindent\labelsep\let\makelabel\proofstyle% |
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242 | \advance\@topsep-\parskip% |
243 | \advance\@topsepadd-\parskip% |
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244 | \@qedhack% |
245 | \item[#1]% |
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246 | }{% |
247 | \qed\endtrivlist% |
248 | } |
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249 | % \end{macrocode} |
250 | % \end{environment} |
251 | % |
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252 | % \begin{macro}{\proofstyle} |
253 | % |
254 | % The |\proofstyle| macro is just a style hook for typesetting the `Proof' |
255 | % label. |
256 | % |
257 | % \begin{macrocode} |
258 | \providecommand\proofstyle[1]{\textit{#1.}} |
259 | % \end{macrocode} |
260 | % |
261 | % \end{macro} |
262 | % |
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263 | % Done. |
264 | % |
265 | % \begin{macrocode} |
266 | %</package> |
267 | % \end{macrocode} |
268 | % |
269 | %^^A------------------------------------------------------------------------- |
270 | % \section{Implementation of the theorem style} |
271 | % |
272 | % \begin{macrocode} |
273 | %<*thmstyle> |
274 | % \end{macrocode} |
275 | % |
276 | % \begin{macro}{\thmhead@margin} |
277 | % |
278 | % Firstly, a macro to typeset the theorem environment header, with the number |
279 | % in the margin. |
280 | % |
281 | % \begin{macrocode} |
282 | \def\thmhead@margin#1#2#3{% |
283 | \thmnumber{\llap{#2{\normalsize\quad}}}% |
284 | \thmname{#1}% |
285 | \thmnote{ \the\thm@notefont(#3)}% |
286 | } |
287 | % \end{macrocode} |
288 | % \end{macro} |
289 | % |
290 | % \begin{macro}{\thm@headfont@margin} |
291 | % |
292 | % Now to decide on the header font. Definitely we want boldface; if the |
293 | % documentclass (or \package{mdwfonts}) has decided on a different font |
294 | % family for the headings, then we use that. |
295 | % |
296 | % \begin{macrocode} |
297 | \def\thm@headfont@margin{% |
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298 | \fontseries{\bfdefault}% |
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299 | \ifx\headdefault\@@undfined\else\fontfamily\headdefault\fi% |
300 | \selectfont% |
301 | } |
302 | % \end{macrocode} |
303 | % \end{macro} |
304 | % |
305 | % \begin{macro}{\qedsymbol} |
306 | % |
307 | % Use the nice symbol if available. |
308 | % |
309 | % \begin{macrocode} |
310 | \AtBeginDocument{\ifx\square\@@undefined\else\def\qedsymbol{$\square$}\fi} |
311 | % \end{macrocode} |
312 | % \end{macro} |
313 | % |
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314 | % \begin{macro}{\proofstyle} |
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315 | % |
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316 | % Typeset `Proof' in bold face. |
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317 | % |
318 | % \begin{macrocode} |
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319 | \def\proofstyle#1{{\thm@headfont@margin#1}} |
320 | % \end{macrocode} |
321 | % |
322 | % \end{macro} |
323 | % |
324 | % \begin{macro}{\th@base} |
325 | % \begin{macro}{\@endtheorem} |
326 | % |
327 | % The |\th@base| macro provides the basis for our theorem style. The |
328 | % argument is something to do at the end of the environment. |
329 | % |
330 | % \begin{macrocode} |
331 | \def\th@base#1{% |
332 | \let\thmhead\thmhead@margin% |
333 | \thm@headfont{\thm@headfont@margin}% |
334 | \thm@headpunct{}% |
335 | \advance\thm@postskip-\parskip% |
336 | \@qedhack% |
337 | \def\after@thm{#1}% |
338 | \normalfont% |
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339 | } |
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340 | % \end{macrocode} |
341 | % |
342 | % Ah, but nobody actually does anything with |\after@thm|. Let's fix that. |
343 | % |
344 | % \begin{macrocode} |
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345 | \def\@endtheorem{\after@thm\endtrivlist\@endpefalse} |
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346 | % \end{macrocode} |
347 | % \end{macro} |
348 | % \end{macro} |
349 | % |
350 | % \begin{macro}{\th@plain} |
351 | % \begin{macro}{\th@definition} |
352 | % \begin{macro}{\th@remark} |
353 | % |
354 | % Now this is easy. The space hacking in |\th@remark| is straight from |
355 | % \package{amsthm}. |
356 | % |
357 | % \begin{macrocode} |
358 | \AtBeginDocument{ |
359 | \def\th@plain{\th@base\relax\itshape} |
360 | \def\th@definition{\th@base\qed} |
361 | \def\th@remark{% |
362 | \th@base\qed% |
363 | \thm@preskip\topsep\divide\thm@preskip\tw@% |
364 | \thm@postskip\thm@preskip% |
365 | } |
366 | } |
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367 | %</thmstyle> |
368 | % \end{macrocode} |
369 | % \end{macro} |
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370 | % \end{macro} |
371 | % \end{macro} |
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372 | % |
373 | % \hfill Mark Wooding, \today |
374 | % \Finale |
375 | % |
376 | \endinput |