slepc-3.16.1 2021-11-17
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SlepcAbsEigenvalue

Returns the absolute value of a complex number given its real and imaginary parts.

Synopsis

PetscReal SlepcAbsEigenvalue(PetscScalar x,PetscScalar y)
Not Collective

Input parameters

x  - the real part of the complex number
y  - the imaginary part of the complex number

Notes

This function computes sqrt(x**2+y**2), taking care not to cause unnecessary overflow. It is based on LAPACK's DLAPY2.

In complex scalars, only the first argument is used.

This function is not available from Fortran.

Location: include/slepcmath.h

Examples

src/eps/tutorials/ex18.c.html
src/eps/tutorials/ex41.c.html
src/pep/tutorials/nlevp/pdde_stability.c.html

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Index of all manual pages