**From:** Asmus Freytag (*asmusf@ix.netcom.com*)

**Date:** Thu Apr 20 2006 - 11:05:23 CST

**Previous message:**Keutgen, Walter: "RE: Planck's constant U+210E"**In reply to:**Andreas Prilop: "Re: Planck's constant U+210E"**Next in thread:**Peter Constable: "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 4/20/2006 8:50 AM, Andreas Prilop wrote:

*> On Thu, 20 Apr 2006, James Kass wrote:
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*>
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*>
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*>> Did you check the Mathematical Alphanumeric Symbols range for these?
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*>>
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*>
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*> U+210E is *specifically* Planck's constant, not a *general*
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*> italic "h".
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*>
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*>
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*>
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*>
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Actually, it is both. You will see that the range of general italic

characters has a hole at 1D454

You guessed it, that's because U+210E was already encoded.

The purpose of all these characters is, as Deborah wrote:

*> On Thu, 20 Apr 2006, Deborah Goldsmith wrote:
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*>
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*>
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*>> > To differentiate it for purposes of representing mathematics in plain
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*>> > text.
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*>>
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*>
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*>
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The distinction you make in your answer,

*> Planck's constant is physics, not mathematics.
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*>
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*>
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would surprise many, nay, I say most, physicists, myself included.

When you write physical laws as equations, you are using mathematical

notation,

not something else.

*> Do you mean U+210E should be used as a "*general* mathematical
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*> [or physical] italic small h"?
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*> Should it be used for, say, height?
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*> Should it be used for, say, specific enthalpy?
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*>
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The answer is 'yes' to any of these things and more (provided you want a

lower case 'h').

*> If so, then U+210E is *not* Planck's constant.
*

That's a defect on its name, based on the fact that many early character

sets

did not have a complete collection - however, with MathML, you are

definitely

encouraged to use U+210E for any mathematical variable that needs the

lower case 'h', including those used for physics.

A./

**Next message:**Asmus Freytag: "Re: Planck's constant U+210E"**Previous message:**Keutgen, Walter: "RE: Planck's constant U+210E"**In reply to:**Andreas Prilop: "Re: Planck's constant U+210E"**Next in thread:**Peter Constable: "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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