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**To**:*Thierry Bouche <Thierry.Bouche@ujf-grenoble.fr>***Subject**:**Re: Binary Relations, draft 1****From**:*Hans Aberg <haberg@matematik.su.se>***Date**: Wed, 18 Nov 1998 13:09:08 +0100**Cc**:*math-font-discuss@cogs.susx.ac.uk*- Content-Length: 1115

At 11:31 +0100 1998/11/18, Thierry Bouche wrote: >But, with H. Aberg's rule, we would have to distinguish between: > > Let $f$ be a continuous function (math ital) > >and > > Let $f(x)=\exp(x^2)$ (f should be upright, as it will be of constant >meaning thereafter, whereas x should me math ital) Even though this is not what I meant: The "constantness" of the names should go beyond the local formula and the paper and be more universally accepted -- but it is still up the the every author to interpret what this means. So I think that both $f$ above should be typeset in italics. However, the imaginary unit i should be typeset upright. Then one can distinguish this "i" from a summation index. Otherwise, I just tried to describe what might be an underlying semantic principle (as opposed to principles govern by graphical concerns): My idea is not to enforce or impose this onto others. Hans Aberg * Email: Hans Aberg <mailto:haberg@member.ams.org> * Home Page: <http://www.matematik.su.se/~haberg/> * AMS member listing: <http://www.ams.org/cml/>

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