From: Deborah Goldsmith (goldsmit@apple.com)
Date: Thu Apr 20 2006 - 09:18:37 CST
On Apr 20, 2006, at 7:20 AM, Andreas Prilop wrote:
> The symbol for Planck's constant (6.626E-34 J·s) is an italic "h".
> Why is there a special Unicode character U+210E for it?
To differentiate it for purposes of representing mathematics in plain
text.
>
> The symbol for the elementary charge is an italic "e".
> But of course there is no special Unicode character for it.
U+1D452 MATHEMATICAL ITALIC SMALL E
>
> The symbol for the speed of light is an italic "c".
> But of course there is no special Unicode character for it.
U+1D450 MATHEMATICAL ITALIC SMALL C
>
> The symbol for the fine structure constant is an italic "alpha".
> But of course there is no special Unicode character for it.
U+1D6FC MATHEMATICAL ITALIC SMALL ALPHA
>
> etc. ad inf.
>
>
> So what's this U+210E for?
The same thing as the others: plain text representation of
mathematics. Note that there is not a MATHEMATICAL ITALIC SMALL H
precisely because U+210E exists.
> IMHO, this character should be listed as deprecated.
Why?
Deborah
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