[petsc-users] Is there a way to do row/column scaling of jacobian matrix

[Jed Brown]

On Tue, Apr 5, 2011 at 06:10, Barry Smith <bsmith at mcs.anl.gov> wrote:

> They are done to change the relative importance of different entries in the
> vector to determine stopping conditions and search directions in Newton's
> method.


Note that weighting fields differently is equivalent to choosing units for
the different fields. I think it is generally a good idea to make the units
a runtime option anyway since it lets you check that the code is
dimensionally correct.
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