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Re: Remaining missing glphs
- To: email@example.com
- Subject: Re: Remaining missing glphs
- From: Joerg.Knappen@uni-mainz.de
- Date: Wed, 01 Oct 1997 19:57:07 +0100
Answers to Ulriks historical questions:
>>>1. There's a slot for an Arabic letter `Dal'. Does this bear any
relation to the Hebrew letter `Daleth', which we already have?
If so, could we perhaps get rid it and gain another free slot?
No, it doesn't. Daleth is another tranfinite cardinal, but that dal was
used by a french publisher because of shortage of different d's for
differentials. It was reported by Yannis. Since it seems to be used in only
one book and doesn not need to agree in style with any other mathematical
symbol, it can be moved to a far-out encoding for rarely used characters
>>>2. There are two slots for `Chi1' and `Chi1upright'. According
to the Unicode table there is no such thing as a variant of
Greek capital letter Chi (quote unlike in the case of Upsilon),
so I wonder if this got into Justin's list by mistake?
No, it isn't a mistake. Nuclear and particle physicists, specially those
dealing with Chiral perturbation theory, like a Chi symbol different from a
plain letter X.
>>>3. There are two slots for faked `Vbar' and `Vbarslanted' glyphs.
Accoding to Justin's report, these were mentioned in a message
forwared by Joerg which I couldn't find in the mail archives.
Could someone clarify what these are supposed to be good for
and whether both variants are actually needed? Personally,
I've never seen such a notation in physics, so I'd like to
see a reference justifying their use.
I have digged in my archives, but didn't retrieve the message I have
actually forwarded to Justin Ziegler. I only could find the original
requester of that symbol: firstname.lastname@example.org, but I didn't test
if this e-mail address is still valid more than four years later. Since I
didn't see other requests for this symbol on any TeX related mailing list
or news group, it is probably not very needed.
>>>4. There are two slots for \varbeta (`beta1' and `beta1upright').
This one, I could find in the Unicode tables (U+03D0) listed
as `Greek Symbol Beta', so it is probably justified to leave
that one in, even if it is not currently available in Metafont.
(Yannis's OmegaTimesGreek (TUGboat 17#2) also has this one.)
I don't know, if the variant betas are relevant for _mathematical_
typesetting. On the other hand, I have seen those brezel-betas in classical
greek _texts_ typeset in france.
>>>5. Finally, there are Stigma, Digamma, Koppa, and Sampi which
Yannis calls Greek numerals (and provides in both upper- and
lowercase), while Unicode 2.0 list them as Greek capitals.
I am confused as to their significance and use in math mode
outside of very specific applications in Greek typesetting,
so I'm skeptical about there justification in a math font.
Could someone perhaps provide some background information?
UNicode seems to be confused about the greek numerals. Stigma/Digamma is
greek numeral 6, Qoppa is 90 and Sanpi is 900. From a modern point of view
(in the antique times, the uppercase/lowercase distinction didn't exist yet)
both capital and lowercase version are needed. But in a math font? Maybe
for typesetting texts about ancient greek mathematics? I'm not sure about
them, though I agree on the point on digamma: AMS compatibility requires it.