MaplePrimes - comments on Blog Entry, Directional Derivatives in Maple

MaplePrimes - comments on Blog Entry, Directional Derivatives in Maple http://www.mapleprimes.com/maplesoftblog/130073-Directional-Derivatives-In-Maple en-us 2026 Maplesoft, A Division of Waterloo Maple Inc. Maplesoft Document System Tue, 09 Jun 2026 07:18:44 GMT Tue, 09 Jun 2026 07:18:44 GMT The latest comments added to the Blog Entry, Directional Derivatives in Maple http://www.mapleprimes.com/images/mapleprimeswhite.jpg MaplePrimes - comments on Blog Entry, Directional Derivatives in Maple http://www.mapleprimes.com/maplesoftblog/130073-Directional-Derivatives-In-Maple DifferentialGeometry can use an anholonomic basis http://www.mapleprimes.com/maplesoftblog/130073-Directional-Derivatives-In-Maple?ref=Feed:MaplePrimes:Directional Derivatives in Maple:Comments#comment130075 Just to clarify something...  In DifferentialGeometry you can certainly use an anholonomic basis of, e.g., unit vectors.   The latest comments added to the Blog Entry, Directional Derivatives in Maple 130075 Thu, 26 Jan 2012 20:04:35 Z Torre Torre @Torre  It would certainly be useful http://www.mapleprimes.com/maplesoftblog/130073-Directional-Derivatives-In-Maple?ref=Feed:MaplePrimes:Directional Derivatives in Maple:Comments#comment130076 <a href="http://www.mapleprimes.com/maplesoftblog/130073-Directional-Derivatives-In-Maple#comment130075">@Torre</a>  It would certainly be useful if this comment were expanded to a full demonstration showing how one might use such a basis in the DifferentialGeometry package. For sure, I would appreciate being shown how. RJL The latest comments added to the Blog Entry, Directional Derivatives in Maple 130076 Thu, 26 Jan 2012 20:32:26 Z rlopez rlopez Here's one bit of documentation http://www.mapleprimes.com/maplesoftblog/130073-Directional-Derivatives-In-Maple?ref=Feed:MaplePrimes:Directional Derivatives in Maple:Comments#comment130078 If I can find the time, I will try to write something up with the nice level of clarity that you provided us in your post.  In the meantime, in Maple Help, have a look at what is here   DifferentialGeometry/LessonsAndTutorials/DifferentialGeometry/AdaptedFrames   charlie The latest comments added to the Blog Entry, Directional Derivatives in Maple 130078 Thu, 26 Jan 2012 22:04:43 Z Torre Torre Link http://www.mapleprimes.com/maplesoftblog/130073-Directional-Derivatives-In-Maple?ref=Feed:MaplePrimes:Directional Derivatives in Maple:Comments#comment130082 A quick note that the link to the help file mentioned by Torre can be found online here: <a href="http://www.maplesoft.com/support/help/Maple/view.aspx?path=DifferentialGeometry/LessonsAndTutorials/DifferentialGeometry/AdaptedFrames">http://www.maplesoft.com/support/help/Maple/view.aspx?path=DifferentialGeometry/LessonsAndTutorials/DifferentialGeometry/AdaptedFrames</a> The latest comments added to the Blog Entry, Directional Derivatives in Maple 130082 Fri, 27 Jan 2012 01:53:08 Z bthur bthur Very helpful pointer http://www.mapleprimes.com/maplesoftblog/130073-Directional-Derivatives-In-Maple?ref=Feed:MaplePrimes:Directional Derivatives in Maple:Comments#comment130083 <a href="http://www.mapleprimes.com/maplesoftblog/130073-Directional-Derivatives-In-Maple#comment130078">@Torre</a>  Thanks for the pointer to the DG worksheet. I'll have to study that for a bit. My 1970 PhD thesis was in relativistic cosmology, so at one time I knew some differential geometry and continuous group theory, but that was a long time ago. I've looked at the DG package, but there's so much in it that I'm not sure I'll ever master it. Every bit of digging helps, though. RJL The latest comments added to the Blog Entry, Directional Derivatives in Maple 130083 Fri, 27 Jan 2012 03:27:15 Z rlopez rlopez side remark http://www.mapleprimes.com/maplesoftblog/130073-Directional-Derivatives-In-Maple?ref=Feed:MaplePrimes:Directional Derivatives in Maple:Comments#comment130085 1) It needs 'endless' much of time to load the post (though it looks not perfect, despite the effort it certainly needed to produce it): might it be possible to reduce it to essentials and skip the rest to the appended ws which would do much more pretty? 2) Why can I do have it the intuitive way like in http://en.wikipedia.org/wiki/Directional_derivative#In_differential_geometry for example: provide vector and fct ---> result (ok ... but look at the MMA page http://mathworld.wolfram.com/DirectionalDerivative.html and that is what Torre says (I guess): usage for cartesians should be simple. The latest comments added to the Blog Entry, Directional Derivatives in Maple 130085 Fri, 27 Jan 2012 03:43:22 Z Axel Vogt Axel Vogt