Here is the letter from the Autor which I received yesterday.
There seems to be no problem regarding a signed agreement.
I will send him our conversation, so you can get directly in contact.
"Dear Dr Wolz,
Many thanks for your e-mail. I was delighted to hear of your interest in
BOBYQA and that it has supplied some "excellent results".
I would like BOBYQA to be used as much as possible. Therefore I accept
enthusiastically your suggestion that BOBYQA be made available to the Apache
user community.
All of my programming is done in Fortran and I have not studied Java.
Therefore I would prefer you to go ahead with the Java code without sending it
to me for review.
By the way, I have found that a strong advantage of BOBYQA is that it can
usually solve unconstrained problems to high accuracy when there are several
hundred variables, but many users regard problems with only 20 variables as
large. It would be good if you could help to bring them up to date.
I hope your work will be highly successful.
With best wishes,
Mike Powell."
-----Ursprüngliche Nachricht-----
Von: Luc Maisonobe [mailto:luc.maison...@free.fr]
Gesendet: Donnerstag, 14. Juli 2011 10:43
An: Commons Developers List
Betreff: Re: [math] BOBYQA
Le 14/07/2011 00:02, Ted Dunning a écrit :
> What is the license on the original Fortran code?
There seem to be no license expressed, so we merely have to ask to the author.
The PDF paper just states at the end that it is available "free of charge". I
guess the author does not really care about licensing issue, at least not as
much as we do.
In this case, as we would be translating existing code that has been developed
as prior art before inclusion in an Apache project, we have to ask for a
Software Grant from the author. Dietmar, as you are already in contact with the
author, would you mind asking him ? If you prefer, just introduce me to him and
I'll take care of this administrative part.
>
> On Wed, Jul 13, 2011 at 2:55 PM, Dietmar Wolz<drdietmarw...@yahoo.de>wrote:
>
>> During experiments with space flight trajectory optimizations I
>> recently observed, that the direct optimization algorithm BOBYQA
>> http://plato.asu.edu/ftp/other_software/bobyqa.zip
>> from Mike Powell is significantly better than the simple Powell
>> algorithm already in commons.math it uses significantly lower
>> function calls and is more reliable for high dimensional problems.
>> You can replace CMA-ES in many more application cases by BOBYQA than by the
>> simple Powell optimizer.
>> I would like to commit a Java port of the algorithm to commons.math.
>> I maintained the structure of the original FORTRAN code, so the code
>> is fast but not very nice.
I guess it could be put in [math] first as is, with the same Fortran struture,
and modified later on if we feel it would be simpler to maintain.
>> Mike Powell offered his support:
>> "I would like BOBYQA to be used as much as possible. Therefore I
>> accept enthusiastically your suggestion that BOBYQA be made available
>> to the Apache user community."
This is great! Thanks Dietmar for making this possible.
>>
>> What do you think?
>>
>> By the way, I also contacted Anke Tröltsch regarding BC-DFO
>> www.cerfacs.fr/algor/reports/2010/TR_PA_10_70.pdf, which also seems
>> promising, but there is no decision yet whether they will support a
>> commons.math contribution.
This would be great too. Maybe I could get some contacts with Serge Gratton.
Cerfacs is in Toulouse and I know for sure many people who have direct contact
with him. I even think he was present at the same small seminar we attended
together when you and Nikolaus presented your work on CMA-ES.
thanks again Dietmar,
Luc
>>
>>
>>
>
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