# [XeTeX] Using the Unicode prime character (Was re. Single glyphs from a font)

Ross Moore ross at ics.mq.edu.au
Wed Jun 10 01:24:40 CEST 2009

Hi Joel,

On 10/06/2009, at 8:13 AM, Joel C. Salomon wrote:

> Ross Moore wrote:
>> There is a discussion of these "pseudo-script" characters also
>> taking place on a MathML-related list.

> Can you point me to that discussion?

http://lists.w3.org/Archives/Public/www-math/

>
>>> The Unicode prime character is already at the correct size and
>>> position.
>>> Try $\prime{}'$ and you’ll see that the second one is shifted up
>>> by some
>>> amount.  (With $\prime'$ it’s even worse.)
>>
>> I don't see a difference in the placement. (see attached image)
>
> Here’s my code; picture is attached.

OK. I made the image as it would be without rebinding  \prime
(hence with CM fonts for the prime symbol).
Here is the corresponding thing, using that rebinding.

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Not that multiple primes work using $f''''$
or (equivalently) $f^{\prime\prime\prime\prime}$.
But maybe these primes are a bit small.
With my Unicode patch $f\prime\prime\prime\prime$ looks good too.

That is the effect that you want?
Then try the following extension to my previous patch, which
simply removes the ^ from the expansion of ' when active:

\makeatletter
\UnicodeMathSymbol{"02032}{\prime}{\mathord}{prime}%
\let\prime ?
{\catcode\' \active
\gdef '{\bgroup\prim at s}}
\makeatother

There's in fact no need for any changes to  \prim at s , etc.

> —Joel Salomon

Cheers,

Ross

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Ross Moore                                       ross at maths.mq.edu.au
Mathematics Department                           office: E7A-419
Macquarie University                             tel: +61 (0)2 9850 8955
Sydney, Australia  2109                          fax: +61 (0)2 9850 8114
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