[Groff] Re: weierstrass in UTF-8 output

[Markus Kuhn]

Bruno Haible wrote on 2000-01-13 13:00 UTC:
>          p        \(wp            weierstrass      Weierstrass p
> ! 
> ! (The latter is mapped to U+2118 in the Adobe glyph list, but this is wrong:
> ! U+2118 is a "SCRIPT CAPITAL P", not a Weierstrass p).

No, Adobe's glyphlist is perfectly right here. U+2118 *IS* supposed to
represent the Weierstass p, despite the unfortunate name of this
character (which won't be changed any more). Please follow the Adobe
glyphlist.

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Kenneth Whistler wrote on this topic 1999-11-15 on the Unicode mailing
list:

[...] The interpretation of U+2118 was fixed in Unicode
3.0 many months ago. The data is available in the UNIDATA directory--
see NamesList.txt. But here is the relevant excerpt:

2118    SCRIPT CAPITAL P
        = Weierstrass elliptic function
        * actually this has the form of a lowercase calligraphic p,
          despite its name

And the glyph shown in the Unicode 3.0 charts has the distinctive
calligraphic p form associated with the Weierstrass elliptic function.

This is the reason why MATH SCRIPT CAPITAL P was *not* omitted in
the math alphanumerics proposal -- because U+2118 "SCRIPT CAPITAL P" is
not actually SCRIPT, nor is it CAPITAL.
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>         <=       \(lh            handleft
>         =>       \(rh            handright

What do they look like in Postscript output? If they are left and right
pointing hands, perhaps one of the following be suitable Unicode
mappings.

U+261A  BLACK LEFT POINTING INDEX
U+261B  BLACK RIGHT POINTING INDEX
U+261C  WHITE LEFT POINTING INDEX
U+261E  WHITE RIGHT POINTING INDEX

Markus

-- 
Markus G. Kuhn, Computer Laboratory, University of Cambridge, UK
Email: mkuhn at acm.org,  WWW: <http://www.cl.cam.ac.uk/~mgk25/>