[petsc-users] scalar abs()

[Matthew Knepley]

You can also use PetscAbsScalar().

  Matt

On Fri, Jan 15, 2010 at 1:29 PM, Matthew Knepley <knepley at gmail.com> wrote:

> fabs().
>
>   Matt
>
>
> On Fri, Jan 15, 2010 at 1:25 PM, Ryan Yan <vyan2000 at gmail.com> wrote:
>
>> Hi All,
>> I am solving nonlinear BVP on structure grid using DM.
>>
>> For the variable v, I have the following term included in my residual:
>> abs(v)*v
>>
>> My question is:
>> In DMMGSetSNESLocal(), for the FormFunctionLocal(), at interior node i,
>> What is the right PETSc function to use for the abs in:
>> abs(x[i].v) * x[i].v
>>
>> Thanks,
>> Yan
>>
>
>
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener
>



-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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