SlepcAbs — SLEPc 3.25.1 documentation

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# SlepcAbs

Returns \(\sqrt{x^2+y^2}\), taking care not to cause unnecessary overflow. It is based on LAPACK’s `DLAPY2`.

## Synopsis

    static inline PetscReal SlepcAbs(PetscReal x,PetscReal y)

Not Collective

## Input parameters

- x - the first real number

- y - the second real number

## Output parameter

- return - the result

## Fortran Note

This function is not available from Fortran.

## Level

developer

## Location

include/slepcmath.h

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