%%
%% Package: spectralsequences v1.3.3 2023-01-28
%% Author: Hood Chatham
%% Email: hood@mit.edu
%% Date: 2023-01-28
%% License: Latex Project Public License
%%
%% File: spectralsequencesmanualpreamble.tex
%%
%%   Manual preamble
%%

% TODO: someday I should comment this -- it's a bit of a mess

\documentclass{ltxdoc}
\usepackage[a4paper,left=2.25cm,right=2.25cm,top=2.5cm,bottom=2.5cm,nohead]{geometry}
\usepackage[tooltips]{spectralsequences}
\usetikzlibrary{shapes.geometric}
\usepackage{amssymb}
\usepackage{afterpage}
\usepackage[notmath]{sansmathfonts}
\usepackage{verbatim}
\usepackage{needspace}
\usepackage[documentation]{tcolorbox}
\usepackage[T1]{fontenc}
\usepackage{hyperref}

\hypersetup{%
        colorlinks=true,
        linkcolor=blue,
        filecolor=blue,
        urlcolor=thered,
        citecolor=blue,
        pdfborder=0 0 0,
}
\usepackage{hyperxmp}
\makeatletter
\def\displaycommand#1{\displaycommand@#1\@nil}
\def\displaycommand@#1#2\@nil{\texttt{\string#1}#2}

% From Christian Feuersänger https://tex.stackexchange.com/a/73103
\makeatletter          % !!!!
\input{pgfmanual.code} % This must be exectuted when catcode of @ is letter
\makeatother           % !!!!

\usepackage{calc} %
\include{pgfmanual-en-macros} % This must be executed when catcode of @ is other

\makeatletter

\parskip=10pt
\parindent=0pt
\MakeShortVerb{\|}

\def\sectionstring{\textbackslash\@xp\@gobble\string}

\def\@gobbletocln#1:{}
\def\eatclnifpresent#1{%
    \eatclnifpresent@#1:\nil
}
\def\eatclnifpresent@#1:#2\nil{%
    \ifx$#2$%
        #1%
    \else
        \removecln#2\nil
    \fi
}
\def\removecln#1:\nil{#1}

\def\removenil#1\nil{#1}

\def\pgfmanual@pretty@singlequote{'}



\def\pulloffstartspaces{\@xp\pulloffstartspaces@\thekey\@nil}
\def\pulloffstartspaces@#1{%
    \def\test{#1}%
    \ifx\test\pgfmanual@pretty@activespace
        \@xp\def\@xp\leadingtoks\@xp{\leadingtoks\pgfmanual@pretty@space}%
        \@xp\pulloffstartspaces@
    \else
        \ifx#1\@nil
            \def\thekey{}%
        \else
            \@xp\@xp\@xp\pulloffstartspaces@@\@xp\@xp\@xp#1%
        \fi
    \fi
}
\def\pulloffstartspaces@@#1\@nil{\def\thekey{#1}}

\def\pulloffstartbrace{\@xp\pullofflbrace\thekey\nil\@nil}
\def\pullofflbrace#1#2\@nil{%
    \ifx\test\pgfmanual@pretty@lbrace
        \@xp\def\@xp\leadingtoks\@xp{\leadingtoks\pgfmanual@pretty@lbrace}%
        \@xp\def\@xp\thekey\@xp{\removenil#2}%
    \else
        \@xp\def\@xp\thekey\@xp{\removenil#1#2}%
    \fi
}


\def\pulloffsinglequote{\@xp\pulloffsinglequote@\thekey\nil\@nil}
\def\pulloffsinglequote@#1#2\@nil{%
    \def\test{#1}%
    \ifx\test\pgfmanual@pretty@singlequote
        \@xp\def\@xp\leadingtoks\@xp{\leadingtoks\pgfmanual@pretty@singlequote}%
        \@xp\def\@xp\thekey\@xp{\removenil#2}%
    \else
        \def\possiblesinglequote{}%
        \@xp\def\@xp\thekey\@xp{\removenil#1#2}%
    \fi
}




% deletes everything except trailing spaces. For making link underline not include trailing spaces (have to reinsert spaces)
\def\onlytrailingspaces#1{%
    \pgfkeys@spdef\temp{#1}%
    \@xp\def\@xp\temp\@xp##\@xp1\temp{}%
    \temp#1%
}

% remove trailing spaces, for making link underline not include trailing spaces
\def\removetrailingspaces{\@xp\removetrailingspaces@\@xp{\thekey}}
\def\removetrailingspaces@#1{%
    \removetrailingspace{#1}%
    \ifx\possibletrailingspace\empty\else
        \edef\trailingtoks{\unexpanded\@xp{\possibletrailingspace}\unexpanded\@xp{\trailingtoks}}%
        \@xp\removetrailingspaces@\@xp{\thekey}%
    \fi
}

\bgroup
\catcode`\Q=3\lccode`\)=`\}\lccode`\~=`\ \lowercase{
    \gdef\removetrailingspace#1{\removetrailingspace@#1QQ~Q}
    \gdef\removetrailingspace@#1~Q{\removetrailingspace@@#1}
    \gdef\removetrailingspace@@#1Q#2Q{\def\thekey{#1}\def\possibletrailingspace{#2}}

    % Remove trailing brace -- so close brace can be colored / styled differently
    \gdef\removetrailingbrace{\@xp\removetrailingbrace@\thekey QQ)Q}
    \gdef\removetrailingbrace@#1)Q{\removetrailingbrace@@#1}
    \gdef\removetrailingbrace@@#1Q#2Q{\def\thekey{#1}\edef\trailingtoks{\unexpanded{#2}\unexpanded\@xp{\trailingtoks}}}
}

\catcode`\^^M=\active
    % remove trailing new line -- so we can properly test whether the last nonwhitespace character is a brace
    \gdef\removetrailingnewline{\@xp\removetrailingnewline@\thekey \nil\nil^^M\nil}%
    \gdef\removetrailingnewline@#1^^M\nil{\removetrailingnewline@@#1}%
    \gdef\removetrailingnewline@@#1\nil#2\nil{\def\thekey{#1}\edef\trailingtoks{\unexpanded{#2}\unexpanded\@xp{\trailingtoks}}}%
\egroup



% Redefine decompose not to do all that fancy crap -- just print as is. Maybe we should get rid of surrounding spaces here and where we do the ref?
\def\decompose#1/\nil{%
    \index{#1@\protect\texttt{#1} key}%
    \index{\mypath#1@\protect\texttt{#1}}%
    \pgfmanualpdflabel{#1}{}%
}
\let\olddeclare\declare
\ExplSyntaxOn
% Get rid of colon so that we can have context based linking -- "page" links to global page, "class:page" prints page and links to the page key in the class section, etc.
\def\declare#1{%
    \exp_args:Nf\olddeclare{%
        \eatclnifpresent{#1}%
    }%
}
\ExplSyntaxOff

%\patchcmd\pgfmanualpdfref{#2}{#2} % If I want it to behave differently for things that aren't links
\patchcmd\pgfmanualpdfref{\expandafter\pgfmanualpdfref@\expandafter{\pgfmanualpdflabel@@}{#2}} % Fix it so that being a link doesn't change the color
    {\colorlet{temp}{.}\expandafter\pgfmanualpdfref@\expandafter{\pgfmanualpdflabel@@}{\textcolor{temp}{#2}}}{}{}%

\newenvironment{manualentry}[1]{%
    \begin{pgfmanualentry}%
    \pgfmanualentryheadline{#1}%
    \pgfmanualbody
}{%
    \end{pgfmanualentry}%
}



\def\removespace#1\space\nil{#1}
\newenvironment{stylekeylist}[2][]{%
  \begin{pgfmanualentry}
    \def\extrakeytext{}%
  \foreach \xx in {#2} {%
    \expandafter\extractkey\xx\space= \marg{keys}\@nil%
    \declareasstyle{\@xp\removespace\mykey\nil}% tells latex not to italicize body
    % The link created in \extractkey is named "key name " with a space at the end.
    % So it won't work. We need to make our own link without the space in it.
    \sseq@eval{\@nx\pgfmanualpdflabel{\@xp\removespace\mykey\nil}{}}%
  }%
  \pgfmanualbody
}{%
  \end{pgfmanualentry}
}%

% Custom handler for value of key -- instead of italicizing, do what?
\def\ifcustomhandler#1{%
    \@xp\pgfkeys@spdef\@xp\test\@xp{#1}%
    \expandafter\ifx\csname\test @ custom handler\endcsname\relax\@xp\@secondoftwo\else\@xp\@firstoftwo\fi
}
\def\customhandler#1{%
    \@xp\pgfkeys@spdef\@xp\test\@xp{#1}%
    \csname\test @ custom handler\endcsname{#1}%
}

\def\declarecustomhandler#1#2{%
    \immediate\write\@auxout{\@nx\expandafter\gdef\@nx\csname#1@ custom handler\endcsname{\@nx#2}}%
    \@xp\gdef\csname#1@ custom handler\endcsname{#2}%
}

\def\declareasstyle#1{\declarecustomhandler{#1}\stylehandler}
\def\stylehandler#1#2{%
    \bgroup
    \let\pgfmanualwordstartup\relax
    \def\thekey{#2}%
    \let\leadingtoks\empty
    \pulloffstartspaces\pulloffstartbrace
    \textcolor{keycolor}{\leadingtoks}%
    \@xp\pgfmanualprettyprintpgfkeys\@xp{\thekey}%
    \egroup
}
\def\codehandler#1#2{%
    \bgroup
    \def\thekey{#2}%
    \let\leadingtoks\empty
    \let\trailingtoks\empty
    \pulloffstartspaces\pulloffstartbrace
    \removetrailingspaces\removetrailingnewline
    \removetrailingspaces\removetrailingbrace
    \textcolor{keycolor}{\leadingtoks}%
    \@xp\pgfmanualprettyprintcode\@xp{\thekey}%
    \textcolor{keycolor}{\trailingtoks}%
    \egroup
}

\declarecustomhandler{font}{\codehandler}
\declarecustomhandler{page constraint}{\codehandler}
\declarecustomhandler{page constraint}{\codehandler}


\let\pgfmanualpdflabel@opt@old\pgfmanualpdflabel@opt
\def\pgfmanualpdflabel@opt[#1]#2#3{%
    \pgfkeys@spdef\temp{#2}%
    \sseq@eval{\unexpanded{\pgfmanualpdflabel@opt@old[#1]}\unexpanded\@xp{\@xp{\temp}{#3}}}%
}

\patchcmd\extractkey{\hfill(\extrakeytext no value)}{}{}{\error}
\patchcmd\extractkey{\def\mykey}{\gdef\mykey}{}{\error}
\patchcmd\extractkeyequal{\hfill(\extrakeytext no default)}{}{}{\error}
\patchcmd\extractkeyequal{\def\mykey}{\gdef\mykey}{}{\error}
\patchcmd\extractinitial{no default, }{}{}{\error}
\patchcmd\extractinitial{\def\mykey}{\gdef\mykey}{}{\error}
\patchcmd\extractdefault{\def\mykey}{\gdef\mykey}{}{\error}
\patchcmd\extractdefault{#2}{{\hskip2pt}#2}{}{\error}
\patchcmd\extractequalinitial{\def\mykey}{\gdef\mykey}{}{\error}
\let\extractkey@\extractkey
\apptocmd\extractkey@{\egroup}{}{\error}
\def\extractkey{\bgroup\@ifnextchar*{\def\decompose####1\nil{}\relax\extractkey@\@gobble}{\extractkey@}}

\def\pgfmanual@pretty@quote{"}
\let\pgfmanual@pretty@pgfkeys@loop@\pgfmanual@pretty@pgfkeys@loop
\def\pgfmanual@pretty@pgfkeys@loop#1{%
	\def\pgfmanual@loc@TMPa{#1}%
    \def\pgfmanual@pretty@pgfkeys@loop@NEXT{\pgfmanual@pretty@pgfkeys@loop@{#1}}%
    \ifx\pgfmanual@loc@TMPa\pgfmanual@pretty@quote%
        \let\pgfmanual@pretty@pgfkeys@loop@NEXT\pgfmanual@pretty@collectquote
    \fi
    \pgfmanual@pretty@pgfkeys@loop@NEXT
}
\def\pgfmanual@pretty@collectquote{%
    \let\pgfmanualprettyprinterhandlecollectedargs=\pgfmanual@pretty@collectargs@finish@collectquote
    \let\pgfmanualprettyprinterhandlecollectedargsVtwo\pgfmanualprettyprinterhandlecollectedargsVtwo@default
    \pgfmanualprettyprintercollectupto"%
    	{\pgfmanual@pretty@collectquote@b}%
}
\def\pgfmanual@pretty@collectquote@b{%
    \let\pgfmanualprettyprinterhandlecollectedargs=\pgfmanual@pretty@collectargs@finish@collectquote@b
    \pgfmanualprettyprintercollectupto,{%
        \@xp\afterpgfmanual@pretty@collectquote\temp
    }%
}

\def\afterpgfmanual@pretty@collectquotenocomma,{\pgfmanual@pretty@pgfkeys@loop}
\def\afterpgfmanual@pretty@collectquote{\pgfmanual@pretty@pgfkeys@loop}
\def\pgfmanual@pretty@collectargs@finish@collectquote#1{\textcolor{keycolor}{\pgfmanualpdfref{""quotes}{"#1"}}}
\def\pgfmanual@pretty@collectargs@finish@collectquote@b#1{%
    \def\thekey{#1}%
    \edef\temp{\ifpgfmanualprettyprinterfoundterminator,\fi}%
    \pgfkeys{/codeexample/prettyprint/key name/.code={\textcolor{keycolor}{##1}}}%
    \def\leadingtoks{}\def\trailingtoks{}%
    \pulloffstartspaces\pulloffsinglequote\pulloffstartspaces\pulloffstartbrace
    \removetrailingspaces\removetrailingbrace
    \textcolor{keycolor}{{}\leadingtoks}% {} here to prevent \textcolor from eating initial space
    \@xp\pgfmanual@pretty@pgfkeys@loop\thekey\pgfmanual@EOI
    \textcolor{keycolor}{{}\trailingtoks}%
}

% Don't allow braces in key names
\patchcmd\pgfmanual@pretty@pgfkeys@collectkey{%
	\def\pgfmanual@pretty@pgfkeys@collectkey@next{%
		\pgfmanualprettyprintercollectargcount{1}{\pgfmanual@pretty@pgfkeys@collectkey}%
		#1%
	}%
}{%			
    \expandafter\pgfmanual@pretty@pgfkeys@processkey\expandafter{\the\toks0 }%
		#1%
		\def\pgfmanual@pretty@pgfkeys@collectkey@next{\pgfmanual@pretty@pgfkeys@loop}%
}{}{\error}

% Redefine point collection to correctly balance the parens
% Has unfortunate side effect that it now throws an error if parens don't balance.
\let\pgfmanual@pretty@collectpoint@old\pgfmanual@pretty@collectpoint
%\def\pgfmanual@pretty@collectpoint{\pgfmanual@pretty@collectpoint@(} %)
%\DeclareDocumentCommand\pgfmanual@pretty@collectpoint@{r()}{%
%    \pgfmanualprettyprinterfoundterminatortrue
%	\pgfmanual@pretty@collectargs@finish@collectpoint{#1}%
%	\afterpgfmanual@pretty@collectpoint
%}



\pgfqkeys{/codeexample/prettyprint}{
	cs arguments/meta/.initial=1, % Make \meta work correctly in codeexample
	cs/meta/.code={\textcolor{black}{\meta{\@gobble#1}}},
%
	cs arguments/opt/.initial=1,
	cs/opt/.code={\opt{\@gobble#1}},
 %
    cs arguments/oarg/.initial=1,
	cs/oarg/.code={\oarg{\@gobble#1}},
%
    cs arguments/marg/.initial=1,
	cs/marg/.code={\marg{\@gobble#1}},
    cs arguments/metatt/.initial=1,
	cs/metatt/.code={\meta{\texttt{\textup{\@gobble#1}}}},
%
    cs arguments/pars/.initial=1,
    cs/pars/.code={\@xp\pars\@xp{\@xp\pgfmanualprettyprintpgfkeys\@xp{\@gobble#1}}},
    cs arguments/pararg/.initial=1,
    cs/pararg/.code={\pararg{\@gobble#1}},
    cs arguments/parargtwo/.initial=2,
    cs/parargtwo/.code 2 args={\parargtwo{\@gobble#1}{\@gobble#2}},
%
    cs arguments/cscolor/.initial=1,
	cs/cscolor/.code={\textcolor{cscolor}{\@gobble#1}},
    cs arguments/pointcolor/.initial=1,
	cs/pointcolor/.code={\textcolor{pointcolor}{\@gobble#1}},
    %point/.code={\def\temp{#1}\show\temp},
%
    cs arguments/sseqset/.initial=1,
    cs/sseqset/.code 2 args={\textcolor{cscolor}{\string\sseqset}\{\pgfmanualprettyprintpgfkeys{#2}\}},
%
    cs arguments/DeclareDocumentCommand/.initial=2,
    cs/DeclareDocumentCommand/.code={\handlexparsestylecmd#1},
    cs arguments/NewSseqCommand/.initial=2,
    cs/NewSseqCommand/.code={\handlexparsestylecmd#1},
%
    /pdflinks/internal link prefix=pgf,
    key value with style detection/.code 2 args={\pgfkeysalso{/codeexample/prettyprint/key value display only={#2}}}, % get rid of bothersome special style handling
    % handle spaces and colons
    key name/.code={%
        \pgfkeys@spdef\temp{#1}%
        \let\pgfmanual@pretty@pgfkeys@collectkey@keyname\temp
        \textcolor{keycolor}{%
            \pgfmanualpdfref{\temp}{%
                \noligs{\@xp\eatclnifpresent\@xp{\temp}}%
            }%
        }%
        \onlytrailingspaces{#1}%
    },
    key value display only/.code={%
        \sseq@eval{\@nx\pgfutil@in@{/.style}{\pgfmanual@pretty@pgfkeys@collectkey@keyname}}%
        \ifpgfutil@in@\else
            \sseq@eval{\@nx\pgfutil@in@{/.sseq style}{\pgfmanual@pretty@pgfkeys@collectkey@keyname}}%
        \fi
        \ifpgfutil@in@
            \def\thekey{#1}%
            \def\trailingtoks{}%
            \removetrailingspaces\removetrailingbrace
            \@xp\stylehandler\@xp{\@xp}\@xp{\thekey}%
            \textcolor{keycolor}{%
                \trailingtoks
            }%
        \else
            \ifcustomhandler{\pgfmanual@pretty@pgfkeys@collectkey@keyname}{%
                \def\thekey{#1}%
                \def\trailingtoks{}%
                \removetrailingspaces\removetrailingbrace
                \@xp\customhandler\@xp{\@xp\pgfmanual@pretty@pgfkeys@collectkey@keyname\@xp}\@xp{\thekey}%
                \textcolor{keycolor}{%
                    \trailingtoks
                }%
            }{%
                \textcolor{keycolor}{{\itshape{\let\pgfmanualwordstartup\relax\pgfmanualprettyprintpgfkeys{#1}}}}%
            }%
        \fi
    },
    point/.code={%\pgfutil@in@){#1}\ifpgfutil@in@\def\temp{#1}\prettyprintprocesspoint{#1}\else \textcolor{pointcolor}{\noligs{#1}}\fi
    \textcolor{pointcolor}{\noligs{#1}}},
	%/cs/.code={\pgfmanualpdfref{#1}{\textcolor{blue}{#1}}},
%	/cs with args/.code 2 args={\pgfmanualpdfref{#1}{\textcolor{blue}{#1}}\{\pgfmanualprettyprintcode{#2}\pgfmanualclosebrace},
    %/colored
}

\def\handlexparsestylecmd#1#2#3{\pgfkeysvalueof{/codeexample/prettyprint/cs/.@cmd}#1\pgfeov\textcolor{cscolor}{#2}\typesetargspec{#3}}
\def\typesetargspec#1{\{\textcolor{purple}{#1}\}}

\let\oldtextcolor\textcolor
\def\textcolorpoint#1{\oldtextcolor{pointcolor}}


% Normally the verbatim processes stuff using
\let\pgfmanual@verb@collect@code\pgfmanual@verb@collect
\patchcmd\pgfmanual@verb@collect@code{\pgfmanualprettyprintpgfkeys}{\pgfmanualprettyprintcode}{}{\error}
\let\pgfmanual@verb@code\pgfmanual@verb
\patchcmd\pgfmanual@verb@code{\begingroup}{\begingroup\let\pgfmanual@verb@collect\pgfmanual@verb@collect@code}{}{\error}
\def\codeverb|{\pgfmanual@verb@code}

% balance the braces
\NewDocumentCommand\prettyprintprocesspoint { m } {%
    \textcolor{pointcolor}{%
        \bgroup
            \let\pgfmanual@pretty@collectpoint\pgfmanual@pretty@collectpoint@old
            \let\textcolor\textcolorpoint
            \noligs{(\pgfmanualprettyprintcode{#1})}%
        \egroup
    }%
}
%\pgfqkeys{/codeexample}{every codeexample/.style={width=6cm}}

% This macro in pgfmanual-en-macros.tex seems not to work because the call to \openin is wrong...
\def\do@codeexamplefromfile{%
  \immediate\openin\examplesource examples/spectralsequencesmanual-\codeexamplesource.tex\relax % I only changed this line
  \def\examplelines{}%
  \readexamplelines
  \closein\examplesource
  \expandafter\endofcodeexample\expandafter{\examplelines}%
}

% For some reason it's started duplicating the last line of the file,
% so I added an illogical extra \ifeof and that seems to fix the problem.
\def\readexamplelines{
  \ifeof\examplesource%
  \else
    \immediate\read\examplesource to \exampleline
    \ifeof\examplesource\else  %% Added
        \edef\examplelines{\unexpanded\@xp{\examplelines}\unexpanded\@xp{\exampleline}}%
    \fi                        %% Added
    \expandafter\readexamplelines%
  \fi
}


\pgfqkeys{/sseqpages}{
    class/class:name/.forward to=/sseqpages/class/name,
    class/class:page/.forward to=/sseqpages/class/page,
    struct line/structline:page/.forward to=/sseqpages/struct line/page,
    fit/cc:differential style/.forward to=/sseqpages/fit/differential style,
    tikz primitives/cc:differential style/.forward to=/sseqpages/tikz primitives/differential style
}



\hypersetup{
    pdftitle={The Spectral Sequences Package},
    pdfauthor={Hood Chatham},
    pdfsubject={A spectral sequence drawing package build on tikz},
    pdfkeywords={spectral sequences,algebraic topology,homotopy theory,math,tikz,sseq},
    pdflicenseurl={http://www.latex-project.org/lppl/}
}

\def\pars#1{|(|#1|)|}
\def\pararg#1{\pars{\meta{#1}}}
\def\parargtwo#1#2{|(\meta{#1},\meta{#2})|}
\def\parargthree#1#2#3{|(\meta{#1},\meta{#2},\meta{#3})|}
\def\parargthreeopt#1#2#3{|(\meta{#1},\meta{#2}|\opt{|,\meta{#3}|}|)|}
\def\parargthreevar#1#2#3{|(\meta{#1},\meta{#2}#3)|}

\def\cmdarg{\texttt{\textbackslash}\meta}
\def\ooptions{\oarg{options}}
\def\moptions{|[|\meta{options}|]|}
\def\sourcecoord{\meta{source coordinate}}
\def\targetcoord{\meta{target coordinate}}
\def\sourcen{\meta{source n}}
\def\targetn{\meta{target n}}
\def\sourcename{\meta{source name}}

\def\today{\the\year/\the\month/\the\day}
\def\pgfmanualurl{http://math.mit.edu/~hood/pgfmanual_v3.0.1a.pdf}
\def\xparseurl{http://mirror.ctan.org/macros/latex2e/contrib/l3packages/xparse.pdf}
\def\colormanualurl{http://mirror.ctan.org/macros/latex/required/graphics/color.pdf}

\def\pkg#1{\textsf{\textmd{#1}}}
\def\sseqpages{\textsc{\pkg{spectralsequences}}}
\let\spectralsequences\sseqpages
\def\sseqpkg{\pkg{sseq}}
\let\tikzpkg\tikzname
\def\pgfpkg{\pkg{\textmd{PGF}}}
\def\tikzcdpkg{\pkg{tikzcd}}
\def\pgfplotspkg{\textsc{\pkg{pgfplots}}}
\def\xparsepkg{\pkg{xparse}}
\def\colorpkg{\pkg{color}}
\def\texlive{\TeX\ Live}
\def\miktex{MiK\TeX}
\def\pdflatex{\textsc{PDF}\LaTeX}
\def\lualatex{Lua\LaTeX}
\let\pdfLaTeX\pdflatex
\let\LuaLaTeX\lualatex


\def\env#1{\texttt{\{#1\}}}
\def\sseqpageenv{\pgfmanualpdfref{sseqpage}{\env{sseqpage}}}
\def\sseqdataenv{\pgfmanualpdfref{sseqdata}{\env{sseqdata}}}
\def\tikzpictureenv{\env{tikzpicture}}
\def\scopeenv{\env{scope}}
\def\tikzcdenv{\env{tikzcd}}
\def\eTeX{\leavevmode\hbox{$\varepsilon$}-\TeX}


\def\example#1{\path{example_#1.tex}}


% xparse modifications:
\ExplSyntaxOn
\cs_set_eq:NN \__xparse_grab_U:w \sseq__xparse_grab_U:w
\cs_set_eq:NN \__xparse_add_type_U:w \sseq__xparse_add_type_U:w
\ExplSyntaxOff

\def\@maketitle{%
 \null\vskip 2em
  \begin{center}\let\footnote\thanks\sffamily
    {\huge \@title\par}\vskip 1.5em
    {\large \parbox{.33\textwidth}{\centering\@author}%
            \parbox{.33\textwidth}{\centering\@date}}%
  \vskip2.5em\rule{\textwidth}{.4pt}%
  \end{center}\par\vskip1.5em}
\def\abstractname{}
\def\mailtoHC{\href % some PDF viewers don't like spaces:
    {mailto:<hood@mit.edu>\%20Hood\%20Chatham?subject=[spectralsequences\%20package]}
    {\texttt{hood@mit.edu}}}