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LAPACK version 3.0
dlaruv(3)

PURPOSE
  DLARUV - return a vector of n random real numbers from a uniform (0,1)

SYNTAX
  SUBROUTINE DLARUV( ISEED, N, X )

      INTEGER	     N

      INTEGER	     ISEED( 4 )

      DOUBLE	     PRECISION X( N )

DESCRIPTION
  DLARUV returns a vector of n random real numbers from a uniform (0,1)
  distribution (n <= 128).

  This is an auxiliary routine called by DLARNV and ZLARNV.

ARGUMENTS
  ISEED	  (input/output) INTEGER array, dimension (4)
	  On entry, the seed of the random number generator; the array
	  elements must be between 0 and 4095, and ISEED(4) must be odd.  On
	  exit, the seed is updated.

  N	  (input) INTEGER
	  The number of random numbers to be generated. N <= 128.

  X	  (output) DOUBLE PRECISION array, dimension (N)
	  The generated random numbers.

FURTHER DETAILS
  This routine uses a multiplicative congruential method with modulus 2**48
  and multiplier 33952834046453 (see G.S.Fishman,
  2**b: an exhaustive analysis for b = 32 and a partial analysis for b = 48',
  Math. Comp. 189, pp 331-344, 1990).

  48-bit integers are stored in 4 integer array elements with 12 bits per
  element. Hence the routine is portable across machines with integers of 32
  bits or more.