[petsc-users] Preconditioning in matrix free SNES

[Travis C. Fisher]

Jed,

Thanks for the response. I think I have resolved this particular issue. 
My jacobian was incorrect. I use generalized coordinates and
I missed a scaling factor. I found this by generating the matrix finite 
difference coloring and calculating
the approximate jacobian, which was much easier than I originally 
anticipated. The jacobian I am trying to create is exact for convective 
terms based on the numerical methods (ESWENO finite difference schemes).

Travis