From: Stan Devitt <jsdevitt@stratumtek.com>

Date: Tue, 20 May 2003 17:30:23 -0400

Message-ID: <3ECA9E6F.5050105@stratumtek.com>

To: Robert Miner <RobertM@dessci.com>

CC: brentmh@ece.rice.edu, www-math@w3.org, lizzardg@rice.edu

Date: Tue, 20 May 2003 17:30:23 -0400

Message-ID: <3ECA9E6F.5050105@stratumtek.com>

To: Robert Miner <RobertM@dessci.com>

CC: brentmh@ece.rice.edu, www-math@w3.org, lizzardg@rice.edu

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 GMT

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