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Re: The mapping of phi

From: Elliotte Harold <elharo@metalab.unc.edu>
Date: Wed, 02 Apr 2008 07:32:53 -0700
Message-ID: <47F39915.6060908@metalab.unc.edu>
To: Neil Soiffer <Neils@dessci.com>
Cc: public-html@w3.org, www-math@w3.org

Neil Soiffer wrote:

> That even sort of applies if you use the Unicode value for the 
> character.  Because Unicode changed the glyph associated with the code, 
> any font that was developed and not updated before that change has the 
> wrong character at the &phi and &phiv positions.  

I'm sorry. What happened?!

This makes no sense at all. Unicode does not define *any* glyphs for 
*any* characters, and never has. It maps abstract characters to code 
points. That's all. What glyph is used for those characters is a font 
choice. Unicode cannot change a glyph becuase it never assigned a glyph 
in the first place.

I suppose different printings of various books may use different fonts, 
but this is in no way normative.

> So, depending upon the 
> font, the glyph for 3c5 may be a GREEK SMALL LETTER PHI (an "open" curly 
> phi) or GREEK PHI SYMBOL (a "straight" phi).  See [7] for more details.
> 

Possibly, but none of this changes the fact that &#x03c5; is the Greek 
small letter upsilon. I suppose you meant &#x03C6; ? In Unicode that's 
the small Greek letter phi, whatever glyph is assigned.

-- 
Elliotte Rusty Harold  elharo@metalab.unc.edu
Java I/O 2nd Edition Just Published!
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Received on Wednesday, 2 April 2008 14:33:27 GMT

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