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. Barry
