COMMENT ⊗   VALID 00006 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	\chcode'173←1 \chcode'176←2 \chcode'44←3 \chcode'26←4
C00009 00003	\:@←cmathx \:a←cmr10          \:c←cmr8
C00013 00004	\def\beginpaper{\gdef\tpage{T}\gdef\rauth{}\gdef\rtitle{}\eightpoint}
C00018 00005	\output{\baselineskip 0pt\lineskip0pt	% beginning of output routine, resets skips
C00021 00006	\setcount0 959
C00028 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

% this format simulates the Journal of Combinatorial Theory

\def\lft#1{#1\hfill}
\def\ctr#1{\hfill#1\hfill}
\def\rt#1{\hfill#1}
\def\top#1{#1\vfill}
\def\mid#1{\vfill#1\vfill}
\def\bot#1{\vfill#1}

\def\rjustline#1{\hbox to size{\hskip0pt plus1000cm minus1000cm #1}}
\def\ctrline#1{\hbox to size{\hskip0pt plus1000cm minus1000cm #1\hskip0pt
	plus1000cm minus1000cm}}

\def\trace{\chpar0←} \def\jpar{\chpar1←}
\def\ragged{\chpar8←} \def\disppen{\chpar9←}

\def\log{\mathop{\char'154\char'157\char'147}\limitswitch}
\def\lg{\mathop{\char'154\char'147}\limitswitch}
\def\ln{\mathop{\char'154\char'156}\limitswitch}
\def\lim{\mathop{\char'154\char'151\char'155}}
\def\limsup{\mathop{\char'154\char'151\char'155\,\char'163\char'165\char'160}}
\def\liminf{\mathop{\char'154\char'151\char'155\,\char'151\char'156\char'146}}
\def\sin{\mathop{\char'163\char'151\char'156}\limitswitch}
\def\cos{\mathop{\char'143\char'157\char'163}\limitswitch}
\def\tan{\mathop{\char'164\char'141\char'156}\limitswitch}
\def\cot{\mathop{\char'143\char'157\char'164}\limitswitch}
\def\sec{\mathop{\char'163\char'145\char'143}\limitswitch}
\def\csc{\mathop{\char'143\char'163\char'143}\limitswitch}
\def\max{\mathop{\char'155\char'141\char'170}}
\def\min{\mathop{\char'155\char'151\char'156}}
\def\sup{\mathop{\char'163\char'165\char'160}}
\def\inf{\mathop{\char'151\char'156\char'146}}
\def\det{\mathop{\char'144\char'145\char'164}}
\def\exp{\mathop{\char'145\char'170\char'160}\limitswitch}
\def\Pr{\mathop{\char'120\char'162}}
\def\gcd{\mathop{\char'147\char'143\char'144}}
\def\lcm{\mathop{\char'154\char'143\char'155}}

\def\ldots{{.\≥.\≥.}}
\def\cdots{{\char'401\≥\char'401\≥\char'401}}
\def\ldotss{{.\≥.\≥.\≥}}
\def\cdotss{\cdots\≥}
\def\ldotsm{{\≥.\≥.\≥.\≥}}
\def\vdots{\vbox{\baselineskip 4pt\vskip 6pt\hbox{.}\hbox{.}\hbox{.}}}

\def\leftset{\mathopen{\{\,}}
\def\rightset{\mathclose{\,\}}}

\def\neqv{\mathrel{\not≡}}

\def\%{\char'45 }	% Note, the space after 45 is needed!
\def\rtarr{→}
\def\deg{↑{\hbox{\hskip-1pt\:w\char5}}}

\def\choose{\comb()}

\def\roman#1{\mathop{\hbox{\rm #1}}}

\def\modop{\<\,\mathbin{\char'155\char'157\char'144}\penalty900\<\,}
\def\mod#1{\penalty0\;(\char'155\char'157\char'144\,\,#1)}

\def\qquad{\quad\quad}

\def\cpile#1{\vcenter{\baselineskip\widespacing\lineskip3pt
\halign{\hfill$## $\hfill\cr
\null\cr\noalign{\vskip-4.5pt}#1\noalign{\vskip 4.5pt\vskip-\widespacing}\null\cr}}}
\def\lpile#1{\vcenter{\baselineskip\widespacing\lineskip3pt
\halign{$## $\hfill\cr
\null\cr\noalign{\vskip-4.5pt}#1\noalign{\vskip 4.5pt\vskip-\widespacing}\null\cr}}}
\def\rpile#1{\vcenter{\baselineskip\widespacing\lineskip3pt
\halign{\hfill$## $\cr
\null\cr\noalign{\vskip-4.5pt}#1\noalign{\vskip 4.5pt\vskip-\widespacing}\null\cr}}}
\def\eqalign#1{\vcenter{\baselineskip\widespacing\lineskip3pt
\halign{\hfill$\dispstyle{##}$⊗$\dispstyle{\null##}$\hfill
\null\cr\noalign{\vskip-4.5pt}#1\noalign{\vskip 4.5pt\vskip-\widespacing}\null\cr}}}
\def\eqalignno#1{\vbox{\baselineskip\widespacing\lineskip3pt
   \tabskip 0pt plus 1000pt minus 1000pt
   \halign to size{\hfill$\dispstyle{##}$\tabskip 0pt
   ⊗$\dispstyle{\null##}$\hfill\tabskip 0 pt plus 1000pt minus 1000pt
   ⊗\hfill$ ##$\tabskip 0pt\cr#1}}}
\def\null{\hbox{}}
\def\twoline#1#2{\halign{\hbox to size{##}\cr\quad$\dispstyle{#1}$\hfill\cr
\noalign{\penalty 1000\vskip3pt}\hfill$\dispstyle{#2}$\quad\cr}}

\def\cut#1{\hbox{\lower 9pt
\null\vbox{\hbox{\lower100pt\hbox{\raise100pt
\hbox{$\dispstyle{#1}$}}}\vskip-100pt}}} % pretends that #1 is 9pt deep
\def\spose#1{\hbox to 0pt{\hskip 0pt minus 100pt #1 \hskip 0pt minus 10000000pt}}

\def\properties#1{\vbox{\halign{\hbox to 30pt{\hfill\rm## }⊗\!
\hbox to 272pt{\strut##\strut\hfill}\hskip 10pt\cr\noalign{\vskip-9pt}
#1\noalign{\vskip-9pt}}}}
\:@←cmathx \:a←cmr10          \:c←cmr8
\:d←cmr7   \:e←cmr6  \:f←cmr5 \:g←cmi10
           \:i←cmi8  \:j←cmi7 \:k←cmi6
\:l←cmi5   \:m←cmcsc[fnt,dek] \:n←cms10          
\:p←cms8  \:q←cmb10          \:s←cmb8
           \:u←cmsy10           \:w←cmsy8
\:x←cmsy7  \:y←cmsy6 \:z←cmsy5
\:<←cmssb  \:=←cmcsc8[fnt,dek]  \:?←cmti10

\hsize 26pc \vsize 42pc \maxdepth 2pt \parindent 10pt \topbaseline 10pt
\disppen 1000
\def\widespacing{15pt}
\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\nm{\:m}
	\def\biglp{\mathopen{\vcenter{\hbox{\:@\char'0}}}}
	\def\bigrp{\mathclose{\vcenter{\hbox{\:@\char'1}}}}
	\def\bigv{\hskip 1.111pt\left|\vbox to 7pt{}\right.}
	\def\strut{\lower 3.5pt\vbox to 12pt{}}
	\def\9{\hskip 5pt}
	\mathrm adf \mathit gjl \mathsy uxz \rm}
\def\eightpoint{\baselineskip 10pt \dispskip 10pt 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\nm{\:=}
	\def\biglp{\mathopen{\hbox{\:a(}}}
	\def\bigrp{\mathclose{\hbox{\:a)}}}
	\def\bigv{\hbox{\:u\char'152}}
	\def\strut{\lower 3pt\vbox to 10pt{}}
	\def\9{\hskip 4.25pt}
	\mathrm cef \mathit ikl \mathsy wyz \rm}
\mathex @
\def\bigglp{\mathopen{\vcenter{\hbox{\:@\char'22}}}}
\def\biggrp{\mathclose{\vcenter{\hbox{\:@\char'23}}}}
\def\biggv{\hskip 1.111pt\left|\vbox to 12pt{}\right.}
\def\bigggv{\hskip 1.111pt\left|\vbox to 15pt{}\right.}
\def\biggglp{\mathopen{\vcenter{\hbox{\:@\char'40}}}}
\def\bigggrp{\mathclose{\vcenter{\hbox{\:@\char'41}}}}

\def\xskip{\hskip 7pt plus 3pt minus 4pt}
\def\yskip{\penalty-50\vskip 3pt plus 3pt minus 2pt}
\def\yyskip{\penalty-100\vskip 6pt plus 6pt minus 4pt}
\def\beginpaper{\gdef\tpage{T}\gdef\rauth{}\gdef\rtitle{}\eightpoint}

\def\title#1\par{\save1\ctrline{\:<#1\unskip}}
\def\shorttitle#1\par{\gdef\rtitle{\:m\lowercase{#1\unskip}}}
\def\author#1\par{\save2\ctrline{\:m#1\unskip}}
\def\shortauthor#1\par{\gdef\rauth{\:m\lowercase{#1\unskip}}}
\def\authaddr#1\par{\save3\ctrline{\strut\sl#1\unskip}}
\def\commby#1\par{\save4\ctrline{\strut\sl Communicated by #1\unskip}}
\def\daterecd#1\par{\save5\ctrline{Received #1\unskip}}
\def\keywords#1\par{}
\def\AMSclass#1\par{}
\def\abstract#1\par{\save6\hbox par 23pc{\eightpoint\hbox to 10pt{}#1}}
\def\begintext{\null\vskip 24pt plus 12pt minus 12pt
\box1
\vskip 12pt plus 6pt minus 3pt
\box2
\vskip 12pt plus 6pt minus 3pt
\box3
\vskip 4pt plus 2pt minus 1pt
\box4
\vskip 4pt plus 2pt minus 1pt
\box5
\vskip 24pt plus 12pt minus 12pt
\ctrline{\box6}
\vskip 18pt plus 12pt minus 12pt
\tenpoint}

\def\ref#1{[{\rm#1}]}
\def\thbegin #1. #2\par{\yyskip{\nm#1.}\xskip{\sl#2}\par\yyskip}
\def\proofbegin #1. {{\nm#1:}\xskip}
\def\QED{\quad\hbox{\hskip1pt\vrule width4pt height6pt depth1.5pt
 \hskip1pt}\lower 8.5pt\null}
\def\defbegin #1. {{\nm#1.}\xskip}
\def\references{\penalty-100\vskip 12pt plus 3pt minus 3pt
\ctrline{\:mReferences}\penalty1000\vskip 12pt plus 3pt minus 3pt
\eightpoint}

\def\refno #1. \au#2 #3\par{\noindent\hangindent20pt
\hbox to 20pt{\hskip0pt plus 100pt minus 100pt \bf#1. }\gdef\issame{F}{\nm #2,}
\gdef\ispaper{F}\gdef\isvol{F}\gdef\isissue{F}\gdef\isyear{F}\gdef\ispages{F}
\gdef\thebook{}\gdef\ispubl{F}\gdef\ispubladdr{F}
\if F\issame{\gdef\theauth{#2}}\else{}
#3\!
\if T\ispaper{\thepaper, {\sl\thebook}\if T\isvol{\ \bf\thevol}\else{}
\if T\isissue{, \theissue}\else{}
\if T\isyear{\ (\theyear)}\else{}}
\else{\if F\isbook{---unknown type of reference---}\else{``\thebook,''
\if T\isvol{Vol. \thevol, }\else{}
\if T\ispubl{\thepubl, }\else{}
\if T\ispubladdr{\thepubladdr, }\else{}
\if T\isyear{\theyear}\else{year of publication unknown}}}
\if T\ispages{, \thepages}\else{}.\par}

\def\paper#1 {\gdef\ispaper{T}\gdef\thepaper{#1}}
\def\jour#1 {\gdef\isjour{T}\gdef\thebook{#1}}
\def\vol#1 {\gdef\isvol{T}\gdef\thevol{#1}}
\def\issue#1 {\gdef\isissue{T}\gdef\theissue{#1}}
\def\year#1 {\gdef\isyear{T}\gdef\theyear{#1}}
\def\pages#1 {\gdef\ispages{T}\gdef\thepages{#1}}
\def\MR#1 {}
\def\sameauthor{\gdef\issame{T}\theauth}
\def\toappear{\gdef\ispages{T}\gdef\thepages{to appear}}
\def\book#1 {\gdef\isbook{T}\gdef\thebook{#1}}
\def\publ#1 {\gdef\ispubl{T}\gdef\thepubl{#1}}
\def\publaddr#1 {\gdef\ispubladdr{T}\gdef\thepubladdr{#1}}

\def\endpaper{\penalty1000\vfill
\rjustline{\:cPrinted by the St Anford Press Ltd., Arastradero 1063, Providence.}
\eject}
\output{\baselineskip 0pt\lineskip0pt	% beginning of output routine, resets skips
	\vbox to 47pc{         % prepare the full page of this fixed height
	\if T\tpage		% the next is used when tpage is "T" (title pages)
		{\gdef\tpage{F} % reset tpage
		\vbox to 24pt{	% journal name in place of headlines
		\baselineskip 8pt
		\hbox to size{\:e Reprinted from J\:fOURNAL OF
		\:eC\:fOMPLICATED \:eT\:fHEORY\hfill\:eVol. \cvol, No. \cvolno,
		\cmonth\ \cyear}
		\hbox to size{\:eAll Rights Reserved by Anemic Press, New London
		and York\hfill\:kPrinted in Providence}
		\vfill}
		\page		% insert the page contents
		\vfill		 % extra space before the page number
		\baselineskip 7pt
		\ctrline{\:c\count0}
		\hbox{\:eCopyright \:y\char'175\ \:e\cyear\ by Anemic Press, Inc.}
		\hbox{\:eAll rights of reproduction in any form reserved.}}
	\else{\baselineskip 12pt \hbox{} % empty line to position next baseline
		\hbox to size{\ifeven0{\:a\count0\hfill\rauth\hfill}
			\else{\hfill\rtitle\hfill\:a\count0}}
		\hbox{}	% empty line whose baseline is exactly 24pt from top
		\page\vfill}	% insert the page contents
	}			% completion of the \vbox
	\advcount0}		% increase page number by 1 and end output routine

\jpar 100
\setcount0 959
\def\cvol{82}
\def\cvolno{6}
\def\cmonth{November}
\def\cyear{1976}