Re: Directional derivative in content MathML?

• From: Stan Devitt <jsdevitt@stratumtek.com>
• Date: Tue, 20 May 2003 17:30:23 -0400
• To: Robert Miner <RobertM@dessci.com>
• CC: brentmh@ece.rice.edu, www-math@w3.org, lizzardg@rice.edu
• Message-ID: <3ECA9E6F.5050105@stratumtek.com>

Note that the extension mechanisms work fine here as well.
You can also write:

<declare type="vector"><ci>u</ci></declare>
<apply>
  <csymbol definitionURL="directionalDerivative">D</csymbol>
  <bvar><ci>u</ci></bvar>
   <ci>f</ci>
</apply>

where the definitionURL refers to an appropriate definition of D.

Stan D.

>>Is there an accepted notation for marking up directional (ie. vector) 
>>derivatives (http://mathworld.wolfram.com/DirectionalDerivative.html) in 
>>content MathML?  My first inclination was to use the <gradient> tag, but 
>>that's not quite correct since it's really the dot product of the 
>>gradient and the unit direction vector.  Is the <diff/> tag appropriate 
>>here?  How would I specify the directional vector?  A <bvar> perhaps?
>>    
>>

Received on Tuesday, 20 May 2003 17:28:10 UTC