[petsc-users] about Matrix-Free

[behzad baghapour]

Dear all,

I want to compute Jacobian matrix via Matrix-Free manner in SNES procedure.
I should consider the time-marching term as M*dQ/dt with is not the part of
finite-differencing and should be added into diagonal blocks of the matrix.
So, how should be right to calculate the Jacobian using the prepared Petsc
routines?

Thanks a lot,
BehZad
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