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## Re: [Getfem-users] interpolated fem again

 From: Yves Renard Subject: Re: [Getfem-users] interpolated fem again Date: Thu, 12 Jul 2007 13:12:19 +0200 User-agent: KMail/1.9.5

```Le jeudi 12 juillet 2007 11:19, Andriy Andreykiv a écrit :
> Dear Yves,
>
>     Thank you very much for your suggestion. Please don't spend more time
> on this problem then necessary to tell whether  the idea I present below
> makes sense.
>
> Indeed I need a mass matrix between two vectorial FEM's.
> So, what I think I could do is to obtain this matrix between two scalar
> FEM's, defined on the same mesh and then populate it in such a way that it
> can be used as a mass matrix between two FEM's with target dimention 3.
>      In here I would need to assume that if a scalar DOF's have a certain
> numbering on the nodes of the mesh, the vectorial numbering
> can be automatically obtained like this:  if  i is a number of a scalar
> DOF, then in vectorial 3D FEM the same number i will correspond to X DOF,
> i+1 to Y DOF and i+3 to Z DOF. Hence I could obtain my mixed mass matrix
> the same way I would obtain a standard (single mesh) vectorial mass matrix
> from a scalar one.  Is that correct?
>

Yes, this is correct. Normally, the numeration of dof will correspond in that
sense.

Yves.

-------------------------------------------------------------------------
Yves Renard (address@hidden)       tel : (33) 04.72.43.80.11
Pole de Mathematiques,                       fax : (33) 04.72.43.85.29
Institut Camille Jordan - CNRS UMR 5208
INSA de Lyon, Universite de Lyon
20, rue Albert Einstein
69621 Villeurbanne Cedex, FRANCE
http://math.univ-lyon1.fr/~renard
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