[petsc-users] csqrt

[Barry Smith]

On Feb 28, 2013, at 5:33 AM, Hui Zhang <mike.hui.zhang at hotmail.com> wrote:

> My cluster has an old version of glibc 2.3.3, which can not give usual principal value of square root.  For example, it gives square root of -i as the value with negative real part.
> 
> I 'grep' in the source tree of petsc and found csqrt in many places.  Is this dangerous? Thank you!

   If you are using the default PETSc builds where it works with real numbers then it will have no effect on.

   If you are using PETSc with complex numbers you might consider changing the cluster software.

   Barry