Re: Parallel_Simulation

["John B. Matthews" <nospam@nospam.invalid>]

In article <kghn3m$36m$1@ccpntc8.in2p3.fr>,
 Vincent LAFAGE <lafage@ipno.in2p3.fr> wrote:

> Sorry I hastened to answer while I had not read carefully enough
> A.5.2(47)
> 
>  47. If the generator period is sufficiently long in relation to the
>      number of distinct initiator values, then each possible value of 
>      Initiator passed to Reset should initiate a sequence of random 
>      numbers that does not, in a practical sense, overlap the 
>      sequence initiated by any other value. If this is not possible, 
>      then the mapping between initiator values and generator states 
>      should be a rapidly varying function of the initiator value.
> 
> I see the statement, but while Mersenne Twister algorithms provides 
> very, very long period (2^19937?),  I would appreciate order of 
> magnitudes of the subperiods.

I'm guessing that no overlap "in a practical sense" is based on the 
very low probability:

<http://www.johndcook.com/blog/2012/04/16/random-number-sequence-overlap/>
 
> I guess I have to test,
> And read much more m(__)m

-- 
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>