Math

<..configure html4-math latex ..>

\Configure{[]}
    {\bgroup
        \protect\nested:math
        \PicDisplay
        $$\everymath{}\everydisplay{}}
    {$$\EndPicDisplay \egroup <.try inline par .>}
\Configure{()}{\bgroup
       \protect\nested:math
       \protect\PicMath
        $}
    {$ \protect\EndPicMath \egroup}
\def\nested:math{<.nested pic math .>}

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<..nested pic math ..>

\def\[{\bgroup \def\]{$$\egroup}$$}%
\def${\bgroup \def${$\egroup}$}%

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<..configure html4-math latex ..>+

\Configure{@TITLE}{\Configure{()}{$}{$}}

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<..configure html4-math th4 ..>

\:CheckOption{th4}\if:Option
    \Configure{[]}
       {\PicDisplay $$\everymath{}\everydisplay{}}
       {$$\EndPicDisplay <.try inline par .>}
    \Configure{()}{\PicMath$}{$\EndPicMath}
\fi

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<..picmath plain,latex ..>

\Configure{$$}{\:xhtml{\EndP}\PicDisplay}{\EndPicDisplay}
{\everymath{}\everydisplay{}}
<.pic math formulas .>
<.pic math + tex formulas .>

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<..pic math formulas ..>

\:CheckOption{pic-m} \if:Option
    \Configure{$}{\PicMath}{\EndPicMath}{}
\else
    \Log:Note{for pictorial $...$ environments,
         use the command line option ‘pic-m’ (not recommended!!)}
\fi

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<..pic math + tex formulas ..>

\:CheckOption{pic-m+} \if:Option
    \def\Alt:Math#1${\tmp:toks{$#1$}%
       \Picture*[<.pic math alt .>]{ style="text-align:middle"}$#1$\EndPicture$}
    \def\Alt:Display#1$${\tmp:toks{$$#1$$}%
       \Picture*[<.pic math alt .>]{}$$#1$$\EndPicture$$}
    \def\Alt:lMath#1\){\tmp:toks{$#1$}%
       \Picture*[<.pic math alt .>]{ style="text-align:middle"}$#1$\EndPicture}
    \def\Alt:lDisplay#1\]{\tmp:toks{\[#1\]}%
       \Picture*[<.pic math alt .>]{}$$#1$$\EndPicture}
    \Configure{$}{}{}{\expandafter\Alt:Math}
    \Configure{$$}{}{}{\expandafter\Alt:Display}
%   \Configure{()}{\Alt:lMath}{}
%   \Configure{[]}{\Alt:lDisplay}{}
\else
    \Log:Note{for pictorial $...$ and
        $$...$$ environments with latex alt,
        use the command line option ‘pic-m+’ (not safe!!)}
\fi

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<..configure html4 latex ..>+

\def\PictureAltex{\afterassignment\set:Img\tmp:toks}
\def\set:Img{\Picture*[<.pic math alt .>]{}\the\tmp:toks\EndPicture}

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<..pic math alt ..>

\special{t4ht*=&&}%
\special{t4ht*=""}%
\special{t4ht*=<<}%
\special{t4ht*=>>}%
\HCode{\the\tmp:toks}%
\special{t4ht*=}%

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3.15 Math