[petsc-users] clarification of SNES / FormFunction

[Jed Brown]

Why a copy?
On May 8, 2012 8:16 AM, "Dominik Szczerba" <dominik at itis.ethz.ch> wrote:

> >> 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
>
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