This may be done with the command-line option: -snes_fd
- Peter On Wed, May 22, 2013 at 4:03 PM, Zou (Non-US), Ling <[email protected]>wrote: > Hi All, > > In 'SNESSetJacobian' I could pass 'SNESDefaultComputeJacobian' to let > PETSc do the finite differencing for me to calculate Jacobian, i.e., > > SNESSetJacobian(snes, J, J, SNESDefaultComputeJacobian, PETSC_NULL); > > > In TSSetRHSJacobian, this options seems to be invalid, i.e., it requires a > function to evaluate the Jacobian, i.e., > > > TSSetRHSJacobian(ts, J, J, FormRHSJacobian, PETSC_NULL); > > > Is it possible that TS could also use PETSc finite differencing Jacobian > as SNES does? > > > Best, > > > Ling >
