DLARUV(3)                  MathKeisan LAPACK routine                 DLARUV(3)



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

SYNOPSIS
       SUBROUTINE DLARUV( ISEED, N, X )

           INTEGER        N

           INTEGER        ISEED( 4 )

           DOUBLE         PRECISION X( N )

PURPOSE
       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,
       'Multiplicative  congruential  random  number  generators  with modulus
       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.




 LAPACK auxiliary routine (versionNo3v.e1m)ber 2006                       DLARUV(3)