[petsc-users] TS without an RHSJacobian

[Gideon Simpson]

What happens if I use TS for a nonlinear problem without specifying the RHSJacobian?  There’s some mention in the manual that if you’re working with a problem built on a da, it will use finite differences to approximate it, but I found the language a bit ambiguous.  Could someone elaborate? 
-gideon

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