[petsc-users] clarification of SNES / FormFunction

[Dominik Szczerba]

>> I am currently assuming they are different and am using the "x" from
>> the signature to set up my A(x) and b(x). I was thinking if they are
>> the same (i.e. corresponding to x_n in the Newton method), I could
>> significantly simplify my code. But apparently "x" in the signature is
>> not simply x_n because of the involved line search, correct me if I am
>> wrong.
>
>
> Correct, they are not the same. How could it possibly simplify your code
> "significantly"?

Significantly was perhaps too strong a word, but a vector copy and a
couple lines of code would certainly go. Never mind, thanks a lot for
the clarification.

Dominik