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lapy3(3) LAPACK lapy3(3)

NAME

lapy3 - lapy3: robust sqrt( x^2 + y^2 + z^2 )

SYNOPSIS

Functions


double precision function dlapy3 (x, y, z)
DLAPY3 returns sqrt(x2+y2+z2). real function slapy3 (x, y, z)
SLAPY3 returns sqrt(x2+y2+z2).

Detailed Description

Function Documentation

double precision function dlapy3 (double precision x, double precision y, double precision z)

DLAPY3 returns sqrt(x2+y2+z2).

Purpose:

!>
!> DLAPY3 returns sqrt(x**2+y**2+z**2), taking care not to cause
!> unnecessary overflow and unnecessary underflow.
!>

Parameters

X 

!>          X is DOUBLE PRECISION
!>

Y

!>          Y is DOUBLE PRECISION
!>

Z

!>          Z is DOUBLE PRECISION
!>          X, Y and Z specify the values x, y and z.
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

real function slapy3 (real x, real y, real z)

SLAPY3 returns sqrt(x2+y2+z2).

Purpose:

!>
!> SLAPY3 returns sqrt(x**2+y**2+z**2), taking care not to cause
!> unnecessary overflow and unnecessary underflow.
!>

Parameters

X 

!>          X is REAL
!>

Y

!>          Y is REAL
!>

Z

!>          Z is REAL
!>          X, Y and Z specify the values x, y and z.
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Author

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Tue Jun 30 2026 04:57:07 Version 3.12.0