Alexandre,

A possible source of a Levenberg-Marquardt optimizer:

    http://www.ics.forth.gr/~lourakis/levmar/

It's GPL too, so aside from _possibly_ being cleaner than GSL's implementation 
(there's room for improvement), it's no help.  It appears that they translated 
the code from Minpack, and perhaps the ultimate answer is to do that "one last 
time" under MIT.

Another thing I find interesting is their answer to FAQ 32.  Therein find 
"However, it is possible to obtain a paid license for proprietary commercial 
use under terms different than those of GPL."  Am I wrong, or can that be 
translated as "Pay us and you can use the code as you wish."  So much for true 
freedom.  I'm still suspicious that it is not helpful to someone wanting to 
release MIT wrappers of GPL code, because they are dual-licensing their code, 
not a wrapper.

If nothing else, the FAQ looks interesting on topics such as computing and 
checking the Jacobian.

Bill



________________________________________
From: [email protected] 
[[email protected]] On Behalf Of Alexandre Bergel 
[[email protected]]
Sent: Thursday, November 04, 2010 3:14 PM
To: Pharo Development
Subject: [Pharo-project] Pharo and Astronomy?

Hi!

I am looking for any experience in using Pharo to develop software for 
Astronomy. Especially regarding interoperability with Python, using 
Mathematical libraries (www.nr.com, www.gnu.org/software/gsl, 
matplotlib.sourceforge.net/gallery.html)

Cheers,
Alexandre
--
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Alexandre Bergel  http://www.bergel.eu
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