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From Luc Maisonobe <Luc.Maison...@free.fr>
Subject Re: [math] new pseudo random number generators
Date Tue, 21 Sep 2010 07:34:05 GMT
Le 21/09/2010 09:26, Mikkel Meyer Andersen a écrit :
>> Here is an extract from the answer from Pierre L'Ecuyer:
>>
>>  Our code can be released under either a GPL or a commercial license.
> Well, what about the Apache License then?

It is their code and I did not use it. The main point is we
reimplemented it. Of course, relying on their code that is GPLed would
be a clear no-go as GPL is a category X license (see
<http://www.apache.org/legal/resolved.html#category-x>).

Perhaps I should give a go to still other optimizations just to make
more clear our code is really different ?

Luc

> 
>>  There is also a Java implementation with multiple streams and
>>  substreams in SSJ: see the package rng:
>>  http://www.iro.umontreal.ca/~simardr/ssj/indexe.html
>>  If you reimplement the code, this is a gray zone, but we do not have
>>  a patent on the algorithm.
>>
>> So as I reimplemented from the paper itself (taking the erratas in <
>> http://www.iro.umontreal.ca/~lecuyer/myftp/papers/wellrng-errata.txt>
>> into account) and use different optimization techniques (precomputed
>> indices tables), I would consider it is safe to publish this home-grown
>> code.
> 
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