preso

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+% ============================-*- LaTeX -*-=============================
+%
+%   jeffe.sty -- macros I use everywhere
+%
+%   Jeff Erickson (jeffe@cs.uiuc.edu)
+%   Last modified 09 Jul 2000
+%   This is free; caveat emptor!
+%
+%   Requirements that may not be part of every TeX distribution: 
+%   (1) The standard AMS math packages amsmath and amssymb.  These are
+%       absolutely vital to anyone who typesets mathematics of any
+%       kind.  If you don't have them, get them NOW!!
+%   (2) The textcomp package.  Cosmetic only.
+%   (3) Knuth's manual font `manfnt'.  Cosmetic only.
+%
+% ======================================================================
+\RequirePackage{latexsym,amsmath,amssymb}
+
+\hyphenation{co-or-din-ate co-or-din-ates half-space stereo-iso-mers
+stereo-iso-mer Round-table}
+
+% ----------------------------------------------------------------------
+%  Common abbreviations and words with accents
+% ----------------------------------------------------------------------
+
+% ---- LATIN ----
+\def\etal{\emph{et~al.}}
+\def\ie{\emph{i.e.}}
+\def\eg{\emph{e.g.}}
+\def\vitae{vit\ae{}}
+\def\apriori{\emph{a~priori}}
+\def\aposteriori{\emph{a~posteriori}}
+
+% ---- FRENCH ----
+\def\naive{na\"{\i}ve}
+\def\Naive{Na\"{\i}ve}
+\def\naively{na\"{\i}vely}	% Okay, I know, this isn't French.
+\def\Naively{Na\"{\i}vely}
+\def\cafe{caf\'e}
+
+% ---- GERMAN ----
+\def\fur{f\"ur}
+\def\Universitat{Universit\"at}
+\def\Saarbrucken{Saar\-br\"ucken}	% Bypass TeX hyphenation
+\def\Zurich{Z\"urich}
+
+% ---- PORTUGESE (Hi Jorge!) ----
+\def\Computacao{Computa\c{c}\~ao}
+
+% ---- PROPER NAMES (because I'm lazy) ----
+\def\Benes{Bene\v{s}}		% ...network
+\def\Bezier{B\'ezier}		% ...spline/curve/surface
+\def\Bjorner{Bj\"orner}
+\def\Bochis{Bochi\c{s}}		% Daciana
+\def\Boruvka{Bor\.uvka}		% ...'s MST algorithm
+\def\Bragger{Br\"agger}
+\def\Bronnimann{Br\"onnimann}   \def\Herve{Herv\'e}
+\def\Bruckner{Br\"uckner}
+\def\Caratheodory{Carath\'eodory}	% Constantin
+\def\Chvatal{Chv\'atal}         \def\Vasek{Va\v{s}ek}
+				\def\Joao{Jo\~ao}	% Compa
+\def\Cortes{Cort\'es}		% Carmen
+\def\Dujmovic{Dujmovi\'c}	% Vida
+				\def\Fredo{Fr\'edo}	% Durand
+\def\Erdos{Erd\H{o}s}           \def\Pal{P\'al}
+\def\Furedi{F\"uredi}           \def\Zoltan{Zolt\'an}
+\def\Grobner{Gr\"obner}		% ... basis
+\def\Grunbaum{Gr\"unbaum}	% Branko
+\def\Hanoi{Hano\"\i}		% Tower of...
+\def\Jarnik{Jarn\a'{\i}k}	% ...'s (`Prim's') MST algorithm
+\def\Komlos{Koml\'os}
+\def\Kovari{K\"ov\'ari}
+\def\Lovasz{Lov\'asz}           \def\Laszlo{L\'aszl\'o}
+\def\Matousek{Matou\v{s}ek}     \def\Jiri{Ji\v{r}\'\i}
+\def\Mnev{Mn\"ev}
+\def\Mobius{M\"obius}		% ... strip/transformation/function
+\def\Mucke{M\"ucke}		% Ernst
+\def\ODunliang{\'O'D\'unliang}
+\def\Oleinik{Ole\u{\i}nik}
+                                \def\Janos{J\'anos}     % Pach
+\def\Palasti{Pal\'asti}
+				\def\Belen{Bel\'en}	% Palop
+\def\Petrovskii{Petrovski\u{\i}}
+\def\Pinar{P\i nar}		% Ali
+\def\Plucker{Pl\"ucker}		% ... coordinates
+\def\Poincare{Poincar\'e}	% ... duality/halfplane
+                                \def\Gunter{G\"unter}   % Rote, Ziegler
+\def\Sacristan{Sacrist\'an}	% Vera
+\def\Saskin{\v{S}a\v{s}kin}
+\def\Schomer{Sch\"omer}
+\def\Schonhardt{Sch\"onhardt}	% ... polyhedron
+\def\Sos{S\'os}
+\def\Stackel{St\"ackel}		% Paul
+\def\Szekely{Sz\'ekely}
+\def\Szemeredi{Szemer\'edi}
+\def\Toth{T\'{o}th}		% Geza
+\def\Turan{Tur\'an}
+\def\Ungor{\"Ung\"or}		% Alper
+\def\Voronoi{Vorono\"i}		% ... diagram [for francophile pedants only]
+
+% Other
+\def\Cplusplus{C\raisebox{0.5ex}{\tiny\bf++}}
+
+% ----------------------------------------------------------------------
+%  Simple math stuff
+% ----------------------------------------------------------------------
+
+% ---- SYMBOLS ----
+\let\e\varepsilon               % a ``real'' epsilon
+
+\def\Integer{\mathsf{Z\hspace{-0.4em}Z}}
+\def\Natural{\mathrm{I\!N}}
+\def\Real{\mathrm{I\!R}}
+\def\Proj{\mathrm{I\!P}}	% projective space
+\def\Hyper{\mathrm{I\!H}}	% hyperbolic space
+
+%
+%  These two look okay in Computer Modern 11pt, or Concrete Roman
+%  12pt, but they need serious work in other sizes.  I need to figure
+%  out how to draw a vertical bar, or better yet a shallow arc, inside
+%  the bowls.  Or maybe I need to learn METAFONT.
+%
+\def\Complex{\mathrm{\,\raise 0.33ex\hbox{\scriptsize\bf(}\!\!\!C}}
+\def\Rational{\mathrm{\,\raise 0.33ex\hbox{\scriptsize\bf(}\!\!\!Q}}
+
+%
+%  Here are more standard, but uglier, versions of these symbols.
+%  They stick out, because they're all in Times Roman Bold Outline!
+%  I *really* want a Concrete Blackboard or Euler Blackboard font, but
+%  I'd settle for Computer Modern Blackboard.
+%
+%\def\Real{\mathbb{R}}
+%\def\Proj{\mathbb{P}}
+%\def\Hyper{\mathbb{H}}
+%\def\Integer{\mathbb{Z}}
+%\def\Natural{\mathbb{N}}
+%\def\Complex{\mathbb{C}}
+%\def\Rational{\mathbb{Q}}
+
+\let\N\Natural
+\let\Q\Rational
+\let\R\Real
+\let\Z\Integer
+\def\Rd{\Real^d}
+\def\RP{\Real\Proj}
+\def\CP{\Complex\Proj}
+
+% ---- OPERATORS (requires amsmath) ----
+\def\aff{\operatorname{aff}}		% (\Line is better!)
+\def\area{\operatorname{area}}
+\def\argmax{\operatornamewithlimits{arg\,max}}
+\def\argmin{\operatornamewithlimits{arg\,min}}
+\def\Aut{\operatorname{Aut}}		% Automorphism group
+\def\card{\operatorname{card}}		% cardinality, deprecated for \abs
+\def\conv{\operatorname{conv}}		% (\overline is better!)
+\def\E{\operatorname{E}}		% Expectation: $\E[X]$ (like \Pr)
+\def\EE{\operatornamewithlimits{E}}
+\def\Hom{\operatorname{Hom}}		% Homomorphism group
+\def\id{\operatorname{id}}		% identity
+\def\im{\operatorname{im}}		% image
+\def\lcm{\operatorname{lcm}}
+\def\lfs{\operatorname{lfs}}		% local feature size
+\def\poly{\operatorname{poly}}
+\def\polylog{\operatorname{polylog}}
+\def\rank{\operatorname{rank}}
+\def\rel{\operatorname{rel\,}}		% relative (interior, boundary, etc.)
+\def\sgn{\operatorname{sgn}}
+\def\vol{\operatorname{vol}}		% volume
+
+\def\fp#1{^{\underline{#1}}}            % falling powers: $n\fp{d}$
+\def\rp#1{^{\overline{#1}}}             % rising powers:  $n\rp{d}$
+
+% --- Cheap displaystyle operators ---
+\def\Frac#1#2{{\displaystyle\frac{#1}{#2}}}
+\def\Sum{\sum\limits}
+\def\Prod{\prod\limits}
+\def\Union{\bigcup\limits}
+\def\Inter{\bigcap\limits}
+\def\Lor{\bigvee\limits}
+\def\Land{\bigwedge\limits}
+\def\Lim{\lim\limits}
+\def\Max{\max\limits}
+\def\Min{\min\limits}
+
+% ---- RELATORS ----
+\def\deq{\stackrel{\scriptscriptstyle\triangle}{=}}
+\def\mapsfrom{\leftarrow\!\mapstochar\,}
+\let\into\hookrightarrow		% = one-to-one
+\let\onto\twoheadrightarrow
+
+% ---- DELIMITER PAIRS ----
+\def\floor#1{\lfloor #1 \rfloor}
+\def\ceil#1{\lceil #1 \rceil}
+\def\seq#1{\langle #1 \rangle}
+\def\set#1{\{ #1 \}}
+\def\abs#1{\mathopen| #1 \mathclose|}	% use instead of $|x|$ 
+\def\norm#1{\mathopen\| #1 \mathclose\|}% use instead of $\|x\|$ 
+\def\indic#1{\big[#1\big]}		% indicator variable; Iverson notation
+					% e.g., Kronecker delta = [x=0]
+
+% --- Self-scaling delmiter pairs ---
+\def\Floor#1{\left\lfloor #1 \right\rfloor}
+\def\Ceil#1{\left\lceil #1 \right\rceil}
+\def\Seq#1{\left\langle #1 \right\rangle}
+\def\Set#1{\left\{ #1 \right\}}
+\def\Abs#1{\left| #1 \right|}
+\def\Norm#1{\left\| #1 \right\|}
+\def\Paren#1{\left( #1 \right)}		% need better macro name!
+\def\Brack#1{\left[ #1 \right]}		% need better macro name!
+\def\Indic#1{\left[ #1 \right]}		% indicator variable; Iverson notation
+
+%
+%  Macros to typeset sets like {foo|bar} with all three delimiters
+%  correctly scaled to fit.  What I *really* want is a \middle macro
+%  that acts just like \left and \right.  Grumble.
+%
+\def\Bigbar#1{\mathrel{\left|\vphantom{#1}\right.\n@space}}
+\def\Setbar#1#2{\Set{#1 \Bigbar{#1 #2} #2}}
+\def\Seqbar#1#2{\Seq{#1 \Bigbar{#1 #2} #2}}
+\def\Brackbar#1#2{\Brack{#1 \Bigbar{#1 #2} #2}}
+
+%  C-style arithmetic if-then-else
+\def\arithif#1#2#3{#1 \mathbin? #2 \mathbin: #3}
+
+%  Math mode fbox
+\def\mfbox#1{\mathchoice{{\fbox{\ensuremath{\displaystyle #1}}}}
+			{{\fbox{\ensuremath{\textstyle #1}}}}
+			{{\fbox{\ensuremath{\scriptstyle #1}}}}
+			{{\fbox{\ensuremath{\scriptscriptstyle #1}}}}}
+
+% ---- ``ACCENTS'' ----
+%   NB: Commands equivalent to \lrarrowfill and \overlrarrow are
+%       already defined in amstex!
+\def\lrarrowfill{$\m@th\mathord\leftarrow\mkern-6mu%
+  \cleaders\hbox{$\mkern-2mu\mathord-\mkern-2mu$}\hfill
+  \mkern-6mu\mathord\rightarrow$}
+\def\overlrarrow#1{\vbox{\ialign{##\crcr
+      \lrarrowfill\crcr\noalign{\kern-\p@\nointerlineskip}
+      $\hfil\displaystyle{#1}\hfil$\crcr}}}
+
+\def\Line#1{\!\overlrarrow{\vphantom{t}\smash{\,#1\,}}\!}
+\def\Ray#1{\overrightarrow{\vphantom{t}#1\,}\!}
+\def\Seg#1{\overline{\vphantom{t}#1}}
+
+% --- TEXT STYLES ---
+\def\mathsc#1{\text{\textsc{#1}}}
+\def\mathbs#1{\text{\boldmath\ensuremath{#1}}}
+
+% ----------------------------------------------------------------------
+%  \begin{bigabstract}...\end{bigabstract}
+%  For use in documents with title pages.  Use normal-sized text in
+%  the abstract!
+% ----------------------------------------------------------------------
+\newenvironment{bigabstract}%
+{\medskip\noindent\centerline{\textbf{\large\abstractname}}\begin{quotation}}%
+{\end{quotation}}
+
+% ----------------------------------------------------------------------
+%  Make captions smaller than the text, make their titles bold.
+%  Arguments:   #1 == figure name: "Figure 5"
+%               #2 == caption: "Papers by \Erdos, 1900--2000 (projected)"
+%  Less space after floats and before caption, since captions are smaller
+% ----------------------------------------------------------------------
+\@ifundefined{abovecaptionskip}{\newlength\abovecaptionskip}
+\long\def\@makecaption#1#2{
+   \vskip \abovecaptionskip
+   \setbox\@tempboxa\hbox{{\sf\footnotesize \textbf{#1.} #2}}
+   \ifdim \wd\@tempboxa >\hsize         % IF longer than one line:
+       {\sf\footnotesize \textbf{#1.} #2\par}% THEN set as ordinary paragraph.
+     \else                              %   ELSE  center.
+       \hbox to\hsize{\hfil\box\@tempboxa\hfil}
+   \fi}
+\dbltextfloatsep 18pt plus 2pt minus 4pt% was 20pt plus 2pt minus 4pt
+\textfloatsep 18pt plus 2pt minus 4pt   % was 20pt plus 2pt minus 4pt
+\abovecaptionskip 6pt			% was 10pt
+
+% ----------------------------------------------------------------------
+%  Revised theorem environment:
+%  Add a period after the theorem number, and make theorems slanted
+%  instead of italic to help distinguish text from math.  Use
+%  \boldmath in theorem label in case it includes math.
+% ----------------------------------------------------------------------
+\def\@opargbegintheorem#1#2#3{\trivlist
+	\item[\hskip\labelsep{\bf\boldmath #1\ #2\ (#3).}]\sl}
+\def\@begintheorem#1#2{\trivlist
+	\item[\hskip\labelsep{\bf\boldmath #1\ #2.}]\sl}
+
+% ----------------------------------------------------------------------
+%  \newproof{type}{text}(style)[post]:
+%  Define a new type of unnumbered ``theorem'' environment.  The last
+%  two arguments are optional; most environments will not use them.
+%
+%  To change label style, put new style command in label:
+%       \newproof{comment}{\sf Comment}
+% ----------------------------------------------------------------------
+\def\newproof#1#2{\@ifnextchar({\@snproof{#1}{#2}}{\@snproof{#1}{#2}(\rm)}}
+\def\@snproof#1#2(#3){\@ifnextchar[{\@xnproof{#1}{#2}{#3}}
+                                   {\@xnproof{#1}{#2}{#3}[]}}
+
+\def\@xnproof#1#2#3[#4]{%\expandafter\@ifdefinable\csname #1\endcsname
+{\global\@namedef{#1}{\@prf{#2}{#3}}\global\@namedef{end#1}{\@endprf{#4}}}}
+
+\def\@prf#1#2{\@ifnextchar[{\@xprf{#1}{#2}}{\@yprf{#1}{#2}}}
+\def\@xprf#1#2[#3]{\@yprf{#1\ (#3)}{#2}}
+\def\@yprf#1#2{\begin{trivlist}\item[\hskip\labelsep{\bf\boldmath #1:}]#2}
+
+\def\@endprf#1{#1\end{trivlist}}
+
+%
+%  Standard proof envrionment: last line has a halmos at the right margin.
+%
+\@ifundefined{square}{\let\square\Box}{}	% grumble latex2e 
+\def\QED{\ensuremath{{\square}}}
+\def\markatright#1{\leavevmode\unskip\nobreak\quad\hspace*{\fill}{#1}}
+\def\qed{\markatright{\QED}}
+\newproof{proof}{Proof}[\qed]
+\newproof{sketch}{Proof Sketch}[\qed]
+
+\newenvironment{rawproof}%
+   {\begin{trivlist}\item[\hskip\labelsep\textbf{Proof:}]}%
+   {\qed\end{trivlist}}
+
+%
+%  If the proof ends with a displayed equation, use \aftermath just
+%  before \end{proof} to put the halmos in the ``right'' place.  This
+%  may not work near page boundaries. 
+%
+\def\aftermath{\par\vspace{-\belowdisplayskip}\vspace{-\parskip}\vspace{-\baselineskip}}
+
+% ----------------------------------------------------------------------
+%  One-shot theoremish environment.  For named things like ``Zorn's
+%  Lemma'' or ``The Death Leap Principle'' or ``The Zone Theorem''.
+%  To get one-shot proofish environment, put \rm inside.
+%  New improved version stolen from Erik Demaine.
+% ----------------------------------------------------------------------
+\newenvironment{oneshot}[1]{\@begintheorem{#1}{\unskip}}{\@endtheorem}
+
+% ----------------------------------------------------------------------
+%  Algorithm and code environments -- Algorithms are set in normal
+%  text, with 2em indenting, surrounded by a box.  Code is set in
+%  typewriter text, with 4 space indenting, and no box.
+%
+%  NOTE!  The true width of the minipage environment is determined by
+%  the contents of the longest line, but ONLY because the minipage
+%  contains a tabbing environment, and nothing else.  It's a HaX!
+%
+%  Both environments need optional line numbering and comment macros,
+%  but bold keywords are just distracting.
+% ----------------------------------------------------------------------
+\def\begin@lgo{\begin{minipage}{1in}\begin{tabbing}
+        \quad\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\=\kill}
+\def\end@lgo{\end{tabbing}\end{minipage}}
+
+\newenvironment{algorithm}
+{\begin{tabular}{|l|}\hline\begin@lgo}
+{\end@lgo\\\hline\end{tabular}}
+
+\newenvironment{algo}
+{\begin{center}\begin{algorithm}}
+{\end{algorithm}\end{center}}
+
+\def\Comment#1{\textsf{\textsl{$\langle\!\langle$#1\/$\rangle\!\rangle$}}}
+
+\def\beginc@de{\noindent\begin{center}\begin{minipage}{1in}\tt
+        \begin{tabbing}~~~~\=~~~~\=~~~~\=~~~~\=~~~~\=~~~~\=~~~~\=\kill}
+\def\endc@de{\end{tabbing}\end{minipage}\end{center}}
+
+\newenvironment{code}{\beginc@de}{\endc@de}
+
+%
+% I think these only work with <1 line of text.  Use sparingly!!
+%
+\def\textul#1{\underline{\smash{#1}\vphantom{,}}}
+\def\strike#1{\ensuremath{\overline{\text{\smash{#1}\vphantom{.}}}}}
+
+% ----------------------------------------------------------------------
+%  Include a file verbatim.  Searches the TEXINPUTS path for the file,
+%  even though that's probably not what you really want.  Stolen from
+%  ``verbatimfiles.sty'' by Chris Rowley and others.  [Don't use their 
+%  \vertbatimlisting macro; it has some bizarre side-effects!]
+% ----------------------------------------------------------------------
+\def\verbinput#1{
+\begingroup\@verbatim\frenchspacing\@vobeyspaces\input#1\endgroup
+}
+
+% ----------------------------------------------------------------------
+%  \now  -- Current time in h:mm AM/PM format
+%  \mdyy -- Today's date in m/d/yy format.  Forget Y2K; this is for humans!
+% ----------------------------------------------------------------------
+\newcount\timehh\timehh=\time
+\divide\timehh by 60
+\newcount\timemm\timemm=\time
+\count255=\timehh
+\multiply\count255 by -60
+\advance\timemm by \count255
+\newif\iftimePM
+\ifnum\timehh>11 \timePMtrue\else\timePMfalse\fi
+\ifnum\timehh<1 \advance\timehh by 12\fi
+\ifnum\timehh>12 \advance\timehh by -12\fi
+\def\now{\number\timehh:\ifnum\timemm<10 0\fi\number\timemm
+         \iftimePM pm\else am\fi}
+\newcount\mdYY\mdYY=\year
+\count255=\year
+\divide\count255 by 100
+\multiply\count255 by 100
+\advance\mdYY by -\count255
+\def\mdyy{\number\month/\number\day/\ifnum\mdYY<10 0\fi\number\mdYY}
+
+% ----------------------------------------------------------------------
+%  Notes to myself
+% ----------------------------------------------------------------------
+\def\n@te#1{\textsf{$\langle\!\langle$#1$\rangle\!\rangle$}\leavevmode}
+\def\n@tew@rn{\GenericWarning{}{AUTHOR WARNING: Unresolved \protect\note}}
+
+\def\n@ten@te#1{\marginpar
+	[\hfill\llap{\textcircled{\small#1}$\!\Longrightarrow$}]
+	{\rlap{$\Longleftarrow\!$\textcircled{\small#1}}}}
+
+\def\n@tedingb@t{\@ifundefined{textmusicalnote}
+			{$\circledcirc$}	% if you don't have textcomp
+			{\textmusicalnote}}	% if you do have textcomp
+
+\def\note#1{\n@tew@rn\n@te{\n@ten@te{\n@tedingb@t}#1}}
+
+\def\sidenote#1{\marginpar{\tiny\sf #1}}
+
+
+%----------------------------------------------------------------------
+%  Bibliography aliases, so I can use mnemonic citation keys and
+%  geom.bib at the same time.  \bibalias{foo}{bar} makes \cite{foo}
+%  act (almost) exactly like \cite{bar}.
+%----------------------------------------------------------------------
+\def\bibalias#1#2{%
+    \global\@namedef{b@#1}{%
+        {\@ifundefined{b@#2}{\textsf{?}}{}\csname b@#2\endcsname}}}
+
+%----------------------------------------------------------------------
+%  Flag bad citations and refernces in the margin.  Dangerous if you
+%  have lots of undefined refs; use batchmode the first time.
+%  Incompatible with some document classes.
+%----------------------------------------------------------------------
+\DeclareOption{flagerrors}
+{
+\def\badcite{\ifinner\else\n@ten@te{\textcent}\fi}
+
+\def\badref{\ifinner\else\n@ten@te{$\Join$}\fi}
+
+\def\bibalias#1#2{%
+    \global\@namedef{b@#1}{%
+        {\@ifundefined{b@#2}{\textsf{>>#1??}}{}\csname b@#2\endcsname}}}
+
+\def\@citex[#1]#2{%
+  \let\@citea\@empty
+  \@cite{\@for\@citeb:=#2\do
+    {\@citea\def\@citea{,\penalty\@m\ }%
+     \edef\@citeb{\expandafter\@firstofone\@citeb\@empty}%
+     \if@filesw\immediate\write\@auxout{\string\citation{\@citeb}}\fi
+     \@ifundefined{b@\@citeb}{\mbox{\reset@font\sffamily>\@citeb?}%
+       \badcite%
+       \G@refundefinedtrue%
+       \@latex@warning
+         {Citation `\@citeb' on page \thepage \space undefined}}%
+       {\hbox{\csname b@\@citeb\endcsname}}}}{#1}}
+
+\def\@setref#1#2#3{
+  \ifx#1\relax
+   \protect\G@refundefinedtrue
+   \badref\mbox{\reset@font\sffamily >#3?}
+   \@latex@warning{Reference `#3' on page \thepage \space undefined}%
+  \else
+   \expandafter#2#1\null
+  \fi}
+}
+
+
+% ----------------------------------------------------------------------
+%  Draft notice.  Put \DRAFT on the title page, in place of \date.
+% ----------------------------------------------------------------------
+\def\draftnotice{Preliminary draft --- \mdyy\ --- Not for distribution}
+
+\def\DRAFT{
+\date{\fbox{\textsf{\textbf{\draftnotice}}}}
+\def\@oddfoot{\footnotesize\hss\fbox{\textbf{\textsf{\draftnotice}}}\hss}
+\let\@evenfoot\@oddfoot
+}
+
+% ----------------------------------------------------------------------
+%  Dingbats from the TeX/METAFONT-book manual font
+%  Use only with 11 or 12 pt text.
+%  Doesn't work with TeXtures, which doesn't know about manfnt.
+% ----------------------------------------------------------------------
+\font\manual=manfnt
+\def\goodcube{{\manual\char28}}	% possible cube from MF-book
+\def\badcube{{\manual\char29}}	% impossible cube from MF-book
+\def\starknot{{\manual\char30}}	% 2,5 torus knot from MF-book
+\def\target{{\manual\char36}}	% concentric circles from MF-book
+\def\xflower{{\manual\char38}}	% X flower dingbat from MF-book
+\def\tflower{{\manual\char39}}	% + flower dingbat from MF-book
+\def\changeto{{\manual\char121}}% change arrow
+\def\dbend{{\manual\char127}}   % dangerous bend sign
+
+% ----------------------------------------------------------------------
+%  Dangerous bend environments, stolen from TeXbook and slightly
+%  massaged.
+%
+%  Invoke as \begin{[d]danger}...\end{[d]danger}.  The enclosed text
+%  is offset just like any other list (theorem, proof, etc.)  Puts
+%  sign[s] in front of first two lines of first paragraph, which are
+%  (supposedly) never split by a page boundary.  Does NOT shrink or
+%  otherwise modify the text.
+% ----------------------------------------------------------------------
+%  The dangerous bend signs are the correct size to match two lines of
+%  Computer Modern 9pt type.  I really ought to scale them up to
+%  fit whatever size we're using, but I won't.  Unfortunately, manfnt
+%  thinks it's a 10pt font, so if we want to match 11pt Computer
+%  Modern, we have to scale manfnt to 12.222222pt!  Thanks, Don.
+%
+%  TeX is a HaX.
+% ----------------------------------------------------------------------
+
+% Single danger
+\def\danger{\begin{trivlist}\item[]\noindent%
+\begingroup\hangindent=2.5pc\hangafter=-2\clubpenalty=10000%
+\def\par{\endgraf\endgroup}%
+\hbox to 0pt{\hskip-\hangindent\dbend\hfill}\ignorespaces}
+\def\enddanger{\end{trivlist}}
+
+% Double danger
+\def\ddanger{\begin{trivlist}\item[]\noindent%
+\begingroup\hangindent=4pc\hangafter=-2\clubpenalty=10000%
+\def\par{\endgraf\endgroup}%
+\hbox to 0pt{\hskip-\hangindent\dbend\kern2pt\dbend\hfill}\ignorespaces}
+\def\endddanger{\end{trivlist}}
+
+%----------------------------------------------------------------------
+% 'cramped' list style, stolen from Jeff Vitter
+%----------------------------------------------------------------------
+\def\cramped
+  {\parskip\@outerparskip\@topsep\parskip
+  \@topsepadd2pt\itemsep0pt
+%  \settowidth{\labelwidth}{\@itemlabel}
+%  \advance\leftmargin-\labelsep
+%  \advance\leftmargin-\labelwidth
+%  \advance\@totalleftmargin-\leftmargin
+%  \advance\linewidth\leftmargin
+%  \parshape1\@totalleftmargin\linewidth
+}
+
+%----------------------------------------------------------------------
+%  More footnote symbols, please.
+%----------------------------------------------------------------------
+\def\@fnsymbol#1{\ensuremath{\ifcase#1\or *\or \dagger\or \ddagger\or
+   \mathsection\or \mathparagraph\or \|\or **\or \dagger\dagger
+   \or \ddagger\ddagger \or \mathsection\mathsection \or
+   \mathparagraph\mathparagraph \else\@ctrerr\fi}}
+
+%----------------------------------------------------------------------
+%  TeXbook style quotations -- I should really use the right font, tho.
+%----------------------------------------------------------------------
+\newenvironment{rightquote}[1]
+{\flushright\begin{minipage}{#1\textwidth}
+\parskip0pt\footnotesize\sffamily\slshape}
+{\end{minipage}\par\bigskip}
+\def\quotee#1{\par\vspace{0.5ex}\flushright\unskip\textup{--- #1}}
+
+\ProcessOptions