[petsc-users] scalar abs()

[Ryan Yan]

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
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