GNU

[Brian Gough]

Przemyslaw Sliwa writes:
 > I have a quick question.
 > Can I use the gsl-library in my commercial applications?
 > I do not publish the code.

See http://www.gnu.org/software/gsl/#licensing
or  http://www.gnu.org/licenses/gpl-faq.html

Othewise, I recommend using the Free Software Foundation's license
consulting service, tel: +1-617-542-5942, fax: +1-617-542-2652.  

Their lawyers will analyse your specific situation and give you a
written report.  There is a charge for the service, but it is
discounted if your company signs up for the FSF corporate patronage
programme.

-- 
Brian Gough