From: "Bobby Moretti" <[EMAIL PROTECTED]>

>> Well, I wouldn't call SAGE a single program.
>
> The issue is complicated, and I doubt a lawyer would agree.
>
> Besides, that's exactly what
>> commercial CAS's do. In particular, Maple includes gmp and a series of 
>> other
>> programs under separate licenses.
>
> gmp is licensed under the GNU LGPL, which is GPL without the linking
> requirements, so Maple can do what they want, as long as they don't
> modify GMP. If they modify GMP, then they have to publish their
> changes under the LGPL, but they can leave the maple core alone.

I agree that including gmp in Maple wasn't a good example. Nevertheless, 
SAGE AFAICT is a distribution of various programs rather than a single 
program. Something like, say, TEX Live, that doesn't have a single license, 
see http://www.tug.org/texlive/LICENSE.TL

Alec 


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