COMMENT ⊗   VALID 00006 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	\chcode'173←1 \chcode'176←2 \chcode'44←3 \chcode'26←4
C00007 00003	\:@←cmathx[fnt,dek] \:a←cmr10[fnt,dek] \:b←cmr9[fnt,dek] \:c←cmr8[fnt,dek]
C00011 00004	\def\tpage{F} \def\chead{}	% "global variables"
C00014 00005	\def\chapterbegin #1. #2{\manmark{Chapter #1}{\chead}\sectionskip
C00015 00006	\def\TEX{\hjust{\:aT\hskip-2pt\lower1.94pt\hjust{E}\hskip-2pt X}}
C00020 ENDMK
C⊗;
\chcode'173←1 \chcode'176←2 \chcode'44←3 \chcode'26←4
\chcode'45←5 \chcode'43←6 \chcode'136←7 \chcode 1←8

\def\lft#1{#1\hfill}
\def\ctr#1{\hfill#1\hfill}
\def\rt#1{\hfill#1}

\def\rjustline#1{\hjust to size{\hfill#1}}
\def\ctrline#1{\hjust to size{\hfill#1\hfill}}

\def\trace{\chpar0←}
\trace '301 % shows "overfull boxes"
\def\jpar{\chpar1←}
\chpar2←50 % this will probably become standard for hyphenation
\chpar6←95 \chpar7←50 % likewise

\def\≡{\chcode'173←12 \chcode'176←12 \chcode'44←12 \chcode'26←12
\chcode'45←12 \chcode'43←12 \chcode'136←12 \chcode1←12 \chcode'134←12
\chcode'36←0 \tt}
\def\\{\chcode'176←2 }

\def\ldots{{.\≥.\≥.}}
\def\cdots{{\char'401\≥\char'401\≥\char'401}}
\def\ldotss{{.\≥.\≥.\≥}}
\def\cdotss{\cdots\≥}
\def\ldotsm{{\≥.\≥.\≥.\≥}}

\def\eqalign#1{\vcenter{\halign{\hfill$\dispstyle{##}$⊗$\dispstyle{\;##}$\hfill
\cr#1}}}
\def\eqalignno#1{\vjust{\tabskip 0pt plus 1000pt minus 1000pt
   \halign to size{\hfill$\dispstyle{##}$\tabskip 0pt
   ⊗$\dispstyle{\;##}$\hfill\tabskip 0 pt plus 1000pt minus 1000pt
   ⊗\hfill$ ##$\tabskip 0pt\cr#1}}}
\def\null{\hjust{}}
\def\twoline#1#2#3{\halign{\hjust to size{##}\cr\quad$\dispstyle{#1}$\hfill\cr
\noalign{\penalty 1000\vskip#2}\hfill$\dispstyle{#3}$\quad\cr}}

\def\chop#1#2{\hjust{\lower#1\null\vjust{\hjust{\lower100pt\hjust{\raise100pt
\hjust{$\dispstyle{#2}$}}}\vskip-100pt}}} % pretends that #2 is #1 deep
\:@←cmathx[fnt,dek] \:a←cmr10[fnt,dek] \:b←cmr9[fnt,dek] \:c←cmr8[fnt,dek]
\:d←cmr7[fnt,dek]   \:e←cmr6[fnt,dek]  \:f←cmr5[fnt,dek] \:g←cmi10[fnt,dek]
\:h←cmi9[fnt,dek]   \:i←cmi8[fnt,dek]  \:j←cmi7[fnt,dek] \:k←cmi6[fnt,dek]
\:l←cmi5[fnt,dek]   \:m←cmsc10[fnt,dek] \:n←cms10[fnt,dek] \:o←cms9[fnt,dek]
\:p←cms8[fnt,dek]  \:q←cmb10[fnt,dek] \:r←cmb9[fnt,dek] \:s←cmb8[fnt,dek]
\:t←cmtt[fnt,dek]   \:u←cmsy10[fnt,dek] \:v←cmsy9[fnt,dek] \:w←cmsy8[fnt,dek]
\:x←cmsy7[fnt,dek]  \:y←cmsy6[fnt,dek] \:z←cmsy5[fnt,dek] \:;←cmtitl[fnt,dek]
\:<←cmssb[fnt,dek]  \:=←cmu10[fnt,dek] \:>←cmss8[fnt,dek] \:?←cmsss8[fnt,dek]

\hsize 29pc \vsize 36pc \maxdepth 2pt \parindent 19pt
\parskip 0pt plus 1 pt \lineskip 1pt
\topskip 24pt plus 6pt minus 10pt  \botskip 3pt plus 6pt
\def\tenpoint{\baselineskip 12pt \dispskip 12pt plus 3pt minus 9pt
	\dispaskip 0pt plus 3pt \dispbskip 7pt plus 3pt minus 4pt
	\def\rm{\:a} \def\sl{\:n} \def\bf{\:q} \def\it{\:g}
	\def\biglp{\mathopen{\vcenter{\hjust{\:@\char'0}}}}
	\def\bigrp{\mathclose{\vcenter{\hjust{\:@\char'1}}}}
	\def\9{\hskip 5pt}
	\mathrm adf \mathit gjl \mathsy uxz \rm}
\def\ninepoint{\baselineskip 11pt \dispskip 11pt plus 3pt minus 8pt
	\dispaskip 0pt plus 3pt \dispbskip 6pt plus 3pt minus 3pt
	\def\rm{\:b} \def\sl{\:o} \def\bf{\:r} \def\it{\:h}
	\def\biglp{\mathopen{\hjust{\:a(}}}
	\def\bigrp{\mathclose{\hjust{\:a)}}}
	\def\9{\hskip 4.5pt}
	\mathrm bef \mathit hkl \mathsy vyz \rm}
\def\eightpoint{\baselineskip 9pt \dispskip 9pt plus 3pt minus 7pt
	\dispaskip 0pt plus 3pt \dispbskip 5pt plus 3pt minus 2pt
	\def\rm{\:c} \def\sl{\:p} \def\bf{\:s} \def\it{\:i}
	\def\biglp{\mathopen{\hjust{\:a(}}}
	\def\bigrp{\mathclose{\hjust{\:a)}}}
	\def\9{\hskip 4pt}
	\mathrm cef \mathit ikl \mathsy wyz \rm}
\mathex @  \def\tt{\:t}
\def\bigglp{\mathopen{\vcenter{\hjust{\:@\char'22}}}}
\def\biggrp{\mathclose{\vcenter{\hjust{\:@\char'23}}}}
\def\biggglp{\mathopen{\vcenter{\hjust{\:@\char'40}}}}
\def\bigggrp{\mathclose{\vcenter{\hjust{\:@\char'41}}}}

\def\quad{\hskip 10pt}
\def\qquad{\hskip 20pt}
\def\xskip{\hskip 10pt plus 7pt minus 7pt}
\def\yskip{\penalty-50\vskip 3pt plus 6pt minus 2pt}
\def\yyskip{\penalty-100\vskip 6pt plus 12pt minus 4pt}
\def\sectionskip{\penalty-200\vskip 24pt plus 12pt minus 6pt}

\def\textindent#1{\noindent\hjust to 19pt{\hskip 0pt plus 1000pt minus 1000pt#1\ 
\!}}
\def\hang{\hangindent 19pt}
\def\tpage{F} \def\chead{}	% "global variables"
\def\trule{\vrule height 13.5pt depth 6.5pt}	% used at top of page
\def\titlepage{\gdef\tpage{T}}  % \titlepage sets tpage to T
\def\manmark#1#2{\mark
	{\ifeven{\hjust to .45 in{\:a\hfill\cpage\hfill\trule}\hfill\:=#1\hfill}
	\else{\hfill\:=#2\hfill\hjust to .45 in{\:a\trule\hfill\cpage\hfill}}}}
\output{\baselineskip 0pt\lineskip0pt	% beginning of output routine, resets skips
	\if T\tpage		% the next is used when tpage is "T" (title pages)
		{\gdef\tpage{F} % reset tpage
		\vskip 24pt	% blank space in place of headlines
		\page}		% insert the page contents, no page number
	\else{\moveleft 10pt\vjust to 24pt{\hrule % horizontal rule at top of page
		\hjust to 368pt{\trule\ifeven{\topmark}\else{\botmark}\trule}
		\hrule\vfill}	% horizontal rule under the headline
		\page}		% insert the page contents
	\advcpage}		% increase page number by 1 and end output routine
\def\chapterbegin #1. #2{\manmark{Chapter #1}{\chead}\sectionskip
\hjust{\:<<#1> #2}\penalty1000\vskip 3pt
\manmark{Chapter #1}{#2}\gdef\chead{#2}\noindent\tenpoint\!}

\def\danger{\yyskip\noindent\hangindent 13.888pt for 2
\hskip-13.888pt\:@\char'177\ninepoint}
\def\enddanger{\yyskip\tenpoint}


\def\footnote#1#2{#1\botinsert{\hrule width 5pc
	\vskip 3pt \baselineskip 9pt\hjust to size{\eightpoint#1#2\hfill}}}

\def\TEX{\hjust{\:aT\hskip-2pt\lower1.94pt\hjust{E}\hskip-2pt X}}