[GAP Forum] Question about Random Elements
alexander.konovalov at gmail.com
Sat Apr 25 23:16:01 BST 2009
the IO package by Max Neunhöffer has so called "real random sources".
The IO manuals says: "It is an extension to the library mechanism of
random source objects that uses the devices /dev/random and /dev/
urandom available on Linux systems (and maybe on other operating
systems) providing random numbers that are impossible to predict."
See them in the IO manual here: http://www.gap-system.org/Manuals/pkg/io/doc/chap6.html
On 25 Apr 2009, at 18:57, Joe Bohanon wrote:
> I have a problem I'm working on that involves trying to find an
> element conjugating two subgroups of large matrix groups. As I will
> likely have to run through lots of elements (even after some
> reductions to smaller subgroups). I want to take advantage of a
> cluster with multiple processors, but the way I understand it, if I
> start gap off fresh and run Random or PseudoRandom, I will get the
> same sequence of elements.
> I'd like to be able to change the seed based on which instance of
> the program I am running. All of the nodes have a shared hard
> drive, so I can get an incrementor easily. I just don't know how to
> set the randomizer to start with a different seed.
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