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**To**:*math-font-discuss@cogs.susx.ac.uk***Subject**:**Math font group statement of purpose****From**:*alanje@cogs.susx.ac.uk (Alan Jeffrey)***Date**: Tue, 3 Aug 93 22:27 BST

%%% ==================================================================== %%% @LaTeX-file{ %%% author = "Alan Jeffrey", %%% version = "0.03", %%% date = "03 August 1993", %%% time = "22:26:27 BST", %%% filename = "mfgpurp.tex", %%% address = "School of Cognitive and Computing Sciences %%% University of Sussex %%% Brighton BN1 9QH %%% UK", %%% telephone = "+44 273 606755 x 3238", %%% FAX = "+44 273 678188", %%% checksum = "54448 146 646 5082", %%% email = "alanje@cogs.sussex.ac.uk", %%% codetable = "ISO/ASCII", %%% keywords = "TeX fonts mathematics", %%% supported = "yes", %%% abstract = "This is a draft statement of purpose for the %%% math font group.", %%% docstring = "The checksum field above contains a CRC-16 %%% checksum as the first value, followed by the %%% equivalent of the standard UNIX wc (word %%% count) utility output of lines, words, and %%% characters. This is produced by Robert %%% Solovay's checksum utility.", %%% package = "stands alone", %%% dependencies = "none", %%% } %%% ==================================================================== \documentstyle{ltugboat} \title{Math font group: statement of purpose} \author{Barbara~Beeton} \address{American Mathematical Society} \author{Alan~Jeffrey} \address{University of Sussex} \author{Frank~Mittelbach} \address{\LaTeX3 project} \author{Chris~Rowley} \address{Open University} \author{Justin~Ziegler} \address{Ecole des Mines de Saint Etienne} \def\rtitlex{MFG discussion document} \def\midrtitle{{\sl Statement of purpose\/}} \setcounter{page}{1} \def\theenumi{\thesection.\arabic{enumi}} \begin{document} \maketitle \section*{The math font group} The math font group (MFG) is a joint venture of the \LaTeX3 project and the \TUG\ Extended Mathematics Font Encoding Technical Working Group. This document outlines: \begin{itemize} \item The {\em motivation\/} behind the MFG. \item The {\em standards\/} the MFG proposes to introduce. \item The {\em implementations\/} the MFG proposes to develop. \end{itemize} \section{Motivation} One of \TeX's strongest points is its ability to set mathematics. There has now been over ten years of experience typesetting mathematical material with \TeX. During this time, \TeX's math mode has been used to set a wide variety of material, including traditional mathematics, categorical diagrams, chemical reactions, computer programs and textual material such as `$5\frac12\%$ of $\fam0M^{lle}$~Doe's bids were $3\spadesuit$.' In recent years, the fonts available for use in \TeX\ have radically changed, with the arrival of the Cork standard for setting European Latin languages, and the Virtual Font standard for using non-\MF\ fonts in \TeX. However, the Cork encoding requires new companion math fonts, and there are a number of incompatible encodings for non-\MF\ math fonts. The MFG believes that the time is ripe for a new math font standard, that will act as a companion to the Cork encoding, and will support non-\MF\ math fonts. These standards are needed urgently, since they are a bottleneck for other \TeX\ projects such as \LaTeX3 and the adoption of the Cork encodings. \section{Standardization} The MFG intends to set a number of new standards for \TeX\ math fonts, including: \begin{enumerate} \item Standardizing an interface between \TeX\ and math fonts, specifying the minimum features each math font is expected to provide. This will include glyph positions, ligtable information, and font dimensions. \item Standardizing an interface between a \TeX\ user and a set of macros, specifying the minimum features a math macro package is expected to provide. This will include control sequence names and font changing commands such as \verb|\boldsymbol|. \end{enumerate} The interfaces will contain at least the functionality of \plain\ \TeX, \LaTeX, \AmSTeX\ and \AmS-\LaTeX. \section{Implementation} The MFG intends to deliver a number of tools to support the new standards, including: \begin{enumerate} \item \MF\ programs containing shapes taken from Knuth's Computer Modern fonts, the AMS symbol fonts, the \LaTeX\ symbol font, and the St~Mary's Road font. \item \TeX\ programs implementing the user interface for \plain\ \TeX\ and \LaTeX. \item Virtual font production tools for using \PS\ or other non-\MF\ fonts with the new encodings. \item Test documents for checking whether fonts and macro packages conform to the standards, similar to Knuth's \verb|trip| test for \TeX. \end{enumerate} These tools will allow existing and future \TeX\ documents to be written with a number of new fonts supporting the new standards. \makesignature \end{document}

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