DLAPY3 (3lapack)

return sqrt(x**2+y**2+z**2), taking care not to cause unnecessary overflow

SYNOPSIS

  DOUBLE PRECISION FUNCTION DLAPY3( X, Y, Z )

      DOUBLE       PRECISION X, Y, Z

PURPOSE

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

ARGUMENTS

  X       (input) DOUBLE PRECISION
          Y       (input) DOUBLE PRECISION Z       (input) DOUBLE PRECISION
          X, Y and Z specify the values x, y and z.