[petsc-users] Automatic Differentiation

[Harshad Sahasrabudhe]

Hi,

Does PETSc have automatic differentiation capability? I'm solving an
elliptic non-linear equation in which calculating the correct Jacobian is
extremely demanding. The system doesn't converge with an approximate
Jacobian. Is there any SNES solver I should try which doesn't use a
Jacobian?

Thanks,
Harshad
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