On Tue, Dec 16, 2008 at 11:27 AM, Zhiwen Liang <[email protected]> wrote:

> So every element in the mesh should have diffusion coefficient like this:
> D=[0 0 1
>      0 0 0
>     -1 0 0]
> Does this also lead to 0*x=b?

I think so. The equation doesn't make sense,

     \partial_y \partial_z u - \partial_z \partial_y u

is trivially zero. Right or am I losing my mind? So you are trying to
solve "0 = \alpha".

>> > Hope all is going well.
>> > Recently, I am trying to solve for an equation like this:
>> > \frac{\partial^2 u}{\partial y \partial z}-\frac{\partial^2 u}{\partial
>> > z
>> > \partial y}=\alpha

The above is essentially "0 = \alpha". Do you agree?

-- 
Daniel Wheeler

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