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+%%%========================================================================
+%%% @TeX-font-metrics-file{
+%%%    author              = "Alan Jeffrey and Lars Hellstr{\"o}m",
+%%%    version             = "1.915",
+%%%    date                = "20 November 2000",
+%%%    time                = "17:01:00 CEST",
+%%%    filename            = "mathex.mtx",
+%%%    checksum            = "",
+%%%    email               = "fontinst@cogs.susx.ac.uk",
+%%%    codetable           = "ISO/ASCII",
+%%%    keywords            = "encoding, math, TeX, PostScript",
+%%%    supported           = "yes",
+%%%    abstract            = "These are the extra glyphs needed for TeX 
+%%%                           math fonts, used by the fontinst package.",
+%%%    package             = "fontinst",
+%%%    dependencies        = "fontinst.sty, fontdoc.sty",
+%%% }
+%%%========================================================================
+\relax
+
+\documentclass[twocolumn]{article}
+\usepackage{fontdoc}[1999/11/04]
+
+\title{The \texttt{fontinst} math symbol glyphs}
+\author{Alan Jeffrey\and Lars Hellstr\"om}
+\date{November 20, 2000}
+
+\showbranches
+
+\begin{document}
+
+\maketitle
+
+\section{Introduction}
+
+This document describes the glyphs used by the \texttt{fontinst} 
+package when generating math symbol fonts.
+
+\metrics
+
+% Uses the fontinst package.
+
+\needsfontinstversion{1.900}
+
+
+% \unfakable is a glyph which can't be faked.
+\setcommand\unfakable#1{
+   \setglyph{#1}
+      \glyphrule{500}{500}
+      \glyphwarning{missing glyph `#1'}
+   \endsetglyph
+}
+\begincomment\medskip
+An \textbf{Unfakable} is a glyph which can't be faked. An 
+``\textbf{Unfakable `\#1'}\,'' is equivalent to
+\begin{quotation}\unfakable{\#1}\end{quotation}
+
+\resetcommand\unfakable#1{\Aheading{Unfakable `#1'}}
+\endcomment
+
+
+% \extensible and \vextensible define a number of extensible glyphs.
+\setcommand\extensible#1{
+   \begincomment
+   \subsection{The `#1' extensible}%
+   \endcomment
+   \unfakable{#1}
+   \unfakable{#1tp}
+   \unfakable{#1mid}
+   \unfakable{#1bt}
+   \unfakable{#1ex}
+   \setglyph{#1big} \glyph{#1}{1000} \endsetglyph
+   \setglyph{#1Big} \glyph{#1big}{1000} \endsetglyph
+   \setglyph{#1bigg} \glyph{#1Big}{1000} \endsetglyph
+   \setglyph{#1Bigg} \glyph{#1bigg}{1000} \endsetglyph
+}
+
+\setcommand\vextensible#1{
+   \begincomment
+   \subsection{The `#1' extensible}%
+   \endcomment
+   \unfakable{#1}
+   \unfakable{#1tp}
+   \unfakable{#1mid}
+   \unfakable{#1bt}
+   \unfakable{#1vertex}
+   \setglyph{#1big} \glyph{#1}{1000} \endsetglyph
+   \setglyph{#1Big} \glyph{#1big}{1000} \endsetglyph
+   \setglyph{#1bigg} \glyph{#1Big}{1000} \endsetglyph
+   \setglyph{#1Bigg} \glyph{#1bigg}{1000} \endsetglyph
+}
+
+% \wideaccent defines a wide accent.
+\setcommand\wideaccent#1{
+   \begincomment
+   \subsection{The `#1' wide accents}%
+   \endcomment
+   \unfakable{#1}
+   \setglyph{#1wide} \glyph{#1}{1000} \endsetglyph
+   \setglyph{#1wider} \glyph{#1wide}{1000} \endsetglyph
+   \setglyph{#1widest} \glyph{#1wider}{1000} \endsetglyph
+}
+
+\comment{\textit{displayoperatorscale} is the difference in scale 
+between a big and a display operator, exept for integrals, which have 
+their own scale.}
+\setint{displayoperatorscale}{1200}
+\setint{integralscale}{1728}
+
+\ifisglyph{product}\then
+   \setint{textoperatorsize}{
+      \add{\height{product}}{\depth{product}}
+   }
+\Else
+   \setint{textoperatorsize}{1000}
+   % Default taken from cmex10.
+\Fi
+
+% \integral, \bigoperator and \biggoperator define operators.
+
+\setcommand\integral#1{
+   \begincomment
+   \subsection{The `#1' integrals}%
+   \endcomment
+   \unfakable{#1}
+   \setglyph{#1text} \glyph{#1}{1000} \endsetglyph
+   \setglyph{#1display} \glyph{#1text}{\int{integralscale}} \endsetglyph
+}
+
+\setcommand\bigoperator#1{
+   \begincomment
+   \subsection{The `#1' big operators}%
+   \endcomment
+   \unfakable{#1}
+   \setglyph{#1text} \glyph{#1}{1000} \endsetglyph
+   \setglyph{#1display} \glyph{#1text}{\int{displayoperatorscale}} \endsetglyph
+}
+
+\setcommand\biggoperator#1{
+   \begincomment
+   \subsection{The `#1' big operators}%
+   \endcomment
+   \unfakable{#1}
+   \setglyph{#1text} 
+      \glyph{#1}{
+         \div{\mul{1000}{\int{textoperatorsize}}}
+             {\add{\height{#1}}{\depth{#1}}}
+      }
+   \endsetglyph
+   \setglyph{#1display} 
+      \glyph{#1text}{\int{displayoperatorscale}} 
+   \endsetglyph
+}
+
+
+\begincomment
+\section{Math extension glyphs}
+\endcomment
+
+\unfakable{bracketleftbt}
+\unfakable{bracketrightbt}
+\unfakable{bracketlefttp}
+\unfakable{bracketrighttp}
+
+\setglyph{floorleft}
+   \glyph{bracketleftbt}{1000}
+\endsetglyph
+
+\setglyph{floorright}
+   \glyph{bracketrightbt}{1000}
+\endsetglyph
+
+\setglyph{ceilingleft}
+   \glyph{bracketlefttp}{1000}
+\endsetglyph
+
+\setglyph{ceilingright}
+   \glyph{bracketrighttp}{1000}
+\endsetglyph
+
+\setglyph{bardbl}
+   \glyph{bar}{1000}
+   \glyph{bar}{1000}
+\endsetglyph
+   
+\setglyph{barex}
+   \glyph{bar}{1000}
+\endsetglyph
+
+\setglyph{bardblex}
+   \glyph{bardbl}{1000}
+\endsetglyph
+
+\setglyph{arrowtp}
+   \glyph{arrowup}{1000}
+\endsetglyph
+
+\setglyph{arrowbt}
+   \glyph{arrowdown}{1000}
+\endsetglyph
+
+\setglyph{arrowdbltp}
+   \glyph{arrowdblup}{1000}
+\endsetglyph
+
+\setglyph{arrowdblbt}
+   \glyph{arrowdbldown}{1000}
+\endsetglyph
+
+\unfakable{tilde}
+
+\setglyph{hat}
+   \glyph{circumflex}{1000}
+\endsetglyph
+
+\unfakable{plus}
+\unfakable{union}
+
+\setglyph{unionmulti}
+   \push
+      \movert{\div{\sub{\width{union}}{\scale{\width{plus}}{700}}}{2}}
+      \moveup{\div{\width{plus}}{4}}
+      \glyph{plus}{700}
+   \pop
+   \glyph{union}{1000}
+\endsetglyph
+
+\extensible{parenleft}
+\extensible{parenright}
+\extensible{bracketleft}
+\extensible{bracketright}
+\extensible{braceleft}
+\extensible{braceright}
+\extensible{floorleft}
+\extensible{floorright}
+\extensible{ceilingleft}
+\extensible{ceilingright}
+\extensible{slash}
+\extensible{backslash}
+\extensible{angleleft}
+\extensible{angleright}
+
+\wideaccent{hat}
+\wideaccent{tilde}
+
+\vextensible{radical}
+\vextensible{arrow}
+\extensible{arrowdbl}
+\unfakable{arrowvertexdbl}
+
+\biggoperator{unionsq}
+\biggoperator{circledot}
+\biggoperator{circleplus}
+\biggoperator{circlemultiply}
+\biggoperator{unionmulti}
+\biggoperator{intersection}
+\biggoperator{union}
+\biggoperator{logicaland}
+\biggoperator{logicalor}
+
+\bigoperator{product}
+\bigoperator{summation}
+\bigoperator{coproduct}
+
+\integral{integral}
+\integral{contintegral}
+
+\begincomment
+\subsection{Horizontal braces}
+\endcomment
+
+\unfakable{bracehtipdownleft}
+\unfakable{bracehtipdownright}
+\unfakable{bracehtipupleft}
+\unfakable{bracehtipupright}
+
+\endmetrics
+
+
+\section{Changes}
+
+29 Dec 1993, v1.30: Created file.
+
+3 Jan 1994, v1.301: Renamed some of the glyphs, added fakes for 
+\texttt{arrowverttp} and friends.
+
+8 Jan 1994, v1.304: Renamed \texttt{similareq} to \texttt{similarequal}.
+
+9 Jan 1994, v1.305: Renamed some glyphs to use the same names as Lucida 
+New Math.
+
+16 October 2000, v\,1.915: Updated markup (made it a \LaTeXe\ 
+document!). (LH)
+
+20 November 2000, v\,1.915: Added test for whether the \texttt{product} 
+glyph exists before setting the \textit{textoperatorsize}, using 
+value corresponding to \texttt{cmex10} if it doesn't. Changed 
+\verb|\wideaccent| to call the widest glyph \textellipsis\texttt{widest} 
+instead of \textellipsis\texttt{widerr}. Changed glyph name 
+\texttt{arrowdblvertex} to \texttt{arrowvertexdbl}. (LH) Reported by 
+Alejandro L\'{o}pez-Valencia. 
+
+\end{document}