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Re: zero vector

From: Bill Naylor <Bill.Naylor@mcs.vuw.ac.nz>
Date: Thu, 20 Feb 2003 11:13:41 +1300 (NZDT)
To: Charlet Reedstrom <charlet@rice.edu>
Cc: www-math@w3.org
Message-ID: <Pine.SOL.4.51.0302201057060.27680@debretts.mcs.vuw.ac.nz>

On Wed, 19 Feb 2003, Charlet Reedstrom wrote:

> Date: Wed, 19 Feb 2003 10:36:59 -0600
> From: Charlet Reedstrom <charlet@rice.edu>
> To: www-math@w3.org
> Subject: zero vector
> Resent-Date: Wed, 19 Feb 2003 11:44:25 -0500 (EST)
> Resent-From: www-math@w3.org
>
>
> I am looking for a way to notate the n-dimensional zero vector.  You
> can't use the vector tag with many zeros since the number of zeros is
> unknown. I am told this is normally displayed as a bold zero.  I am
> inclined to use <cn type='vector'>0</cn>, but this doesn't seem to be
> allowed according to the spec.  Any suggestions?
>

One could create a zero_vector OpenMath symbol (or equivalent), taking one
argument (sibling in the XML tree), for the length. Then refer to this
with a MathML semantics or csymbol element.

Bill

P.S. info on OpenMath may be obtained at http://openmath.org
P.P.S this zero vector symbol should probably go in the content dictionary
linalg6, this may be contributed from the OpenMath contribution page:

http://monet.nag.co.uk/cocoon/openmath/cdfiles/collections/contributed.html
Received on Wednesday, 19 February 2003 17:22:13 GMT

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