slepc-3.22.2 2024-12-02
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.
Level
developer
Location
include/slepcmath.h
Examples
src/eps/tutorials/ex18.c
src/eps/tutorials/ex41.c
src/pep/tutorials/ex40.c
src/pep/tutorials/nlevp/pdde_stability.c
src/svd/tutorials/cnetwork/embedgsvd.c
Index of all sys routines
Table of Contents for all manual pages
Index of all manual pages