dolfin team mailing list archive

[Johan Jansson <johanjan@xxxxxxxxxxxxxxxx>]

On Wed, Nov 09, 2005 at 10:48:37AM +0100, hetzel.devel@xxxxxx wrote:
> 
> Hi,
> I'm having two functions say u1 und u2 and two test functions v1 and v2. At the moment I'm using the "Vector Lagrange" Functions to declare u and v as a vector.
> 
> I would like to solve my PDE with u1 and v1 defined on mesh1 (approx. 2000 nodes) and u2 and v2 defined on a different mesh2 (approx. 20 nodes). I would like to get a 2020x2020 matrix. Both meshes will be contain exectly the same area.
> Is there a change to declare the bilinearform in such a manner?
> 
> /Haiko
> 

Hi Haiko,

A form is not connected to a specific mesh, so it's perfectly ok to
assemble the same bilinear form on two different meshes. But then you
would get two different matrices. Why do you want the result in the
same matrix? Isn't it ok to get matrix A1 (2000x2000) corresponding to
the first mesh and matrix A2 (20x20) corresponding to the second mesh?

  Johan