**From:** Deborah Goldsmith (*goldsmit@apple.com*)

**Date:** Thu Apr 20 2006 - 09:18:37 CST

**Previous message:**Andreas Prilop: "Planck's constant U+210E"**In reply to:**Andreas Prilop: "Planck's constant U+210E"**Next in thread:**James Kass: "Re: Planck's constant U+210E"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ] [ attachment ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

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".
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*> 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

*>
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*> 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.
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*>
*

*>
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*> 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

**Next message:**James Kass: "Re: Planck's constant U+210E"**Previous message:**Andreas Prilop: "Planck's constant U+210E"**In reply to:**Andreas Prilop: "Planck's constant U+210E"**Next in thread:**James Kass: "Re: Planck's constant U+210E"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ] [ attachment ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

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