SLARAN returns a random real number from a uniform (0,1)


 distribution.

ISEED

          ISEED is 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.

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

  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.