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Re: Binary Relations, draft 1

Concernant « Re: Binary Relations, draft 1 », Hans Aberg écrit : «
» On the Greek style fonts used in math, I figure they should come in four
» different variations: Upright/italics and non-bold/bold.
» The thing is that an empirical "standard" or general principle for
» typesetting pure math seems to be this:
»    Entities that are considered constant should be typeset upright.
»    Entities that are considered variable should be typeset slanted/italics.

yes, absolutely yes.

Indeed, it is an injury caused by TeX that this usage has been lost. 
BTW, these are more or less codified by an ISO standard about math
notations (published in France by AFNOR, the upright for constants is
explicit in the AFNOR version, i'm not sure about the ISO) -- whose
reference i can't find right now.

Thierry Bouche, Grenoble.