Dear Yves Thank you very much.
Best Regards, Tetsuo 2019年3月11日(月) 21:35 Yves Renard <[email protected]>: > > Dear Tetsuo, > > Yes, in the expression Grad_u * h, h is a direction vector. > > Best Regards, > > Yves > > Le 11/03/2019 à 13:31, Tetsuo Koyama a écrit : > > Dear Yves > > > > Thank you for your reply. > > I really like the design of regular expression. > > Is h means direction vector? > > Sorry to ask about such minor details. I just want to be sure. > > > > Best Regards, > > > > Tetsuo > > > > 2019年3月11日(月) 21:08 Yves Renard <[email protected]>: > >> > >> Dear Tetsuo, > >> > >> It is not easy to find, but the index order in a tensor is shortly > >> explained in the following part of the documentation : > >> > >> http://getfem.org/project/appendixA.html#example-of-elementary-matrix > >> > >> For a gradient, each row is the gradient of a component in such a way > >> that Grad u * h is the derivative in the direction h (so in a sense it > >> is a derivative) > >> > >> Best Regards, > >> > >> Yves > >> > >> > >> Le 11/03/2019 à 12:17, Tetsuo Koyama a écrit : > >>> Dear GetFEM++ Project > >>> > >>> Sorry to ask many question. > >>> I want to ask about regular expression. > >>> When using "Grad_" in regular expression in 3D MeshFem. It seems that > >>> it create 3D tensor. My question is that the meaning of line and > >>> column. > >>> In my forecast, the line is the direction of variable and column is > >>> the direction of gradient. Is it correct? > >>> Is there any related part in the document? > >>> Thank you for reading. > >>> > >>> Best Regard Tetsuo. > >>> > >> -- > >> > >> Yves Renard ([email protected]) tel : (33) 04.72.43.87.08 > >> INSA-Lyon > >> 20, rue Albert Einstein > >> 69621 Villeurbanne Cedex, FRANCE > >> http://math.univ-lyon1.fr/~renard > >> > >> --------- > >> > > -- > > Yves Renard ([email protected]) tel : (33) 04.72.43.87.08 > INSA-Lyon > 20, rue Albert Einstein > 69621 Villeurbanne Cedex, FRANCE > http://math.univ-lyon1.fr/~renard > > --------- >
