Weird (?) results obtained from experiments with the SNESMF module

Barry Smith bsmith at
Fri Dec 19 18:34:17 CST 2008

On Dec 19, 2008, at 6:13 PM, Rafael Santos Coelho wrote:

> Hey, Barry,
> thank you so much for your help and sincerity. I'll do some more  
> tests tomorrow with different problems (using finite elements to  
> discretize the PDE) and I see how it goes.
> Just one thing that wasn't directly answered (maybe you forgot to or  
> maybe you don't know): I still don't get why the JFNK created 4  
> matrix objects.

I don't know. If you run in the debugger and put a break point in  
MatCreate() you will see exactly where each of the four is
being created. BTW: just in case you don't know, the matrix-free  
operator in PETSc is also a Mat object.


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