Re: [Help-gsl] Permissions for using GSL in my own software

[Carl Boettiger]

On Wed, Jan 27, 2010 at 3:45 PM, Earl, Joseph
<address@hidden>wrote:

> I have a question on GSL GPL, in the FAQ it states:
>
> 1) Does the GPL allow me to charge a fee for downloading the program from
> my site?
>
>    Yes. You can charge any fee you wish for distributing a copy of the
> program. If you distribute binaries by download, you must provide
> "equivalent access" to download the source-therefore, the fee to download
> source may not be greater than the fee to download the binary.
>
> 2) Does the GPL allow me to sell copies of the program for money?
>
>    Yes, the GPL allows everyone to do this. The right to sell copies is
> part of the definition of free software. Except in one special situation,
> there is no limit on what price you can charge. (The one exception is the
> required written offer to provide source code that must accompany
> binary-only release.)
>
>
> So the following should be allowed?
>
> - Charge $X for an application binary and required written offer to provide
> the source code for free
> - and charge anything up to $X for the source code only (for people who do
> not purchase the binary)
>

And would it then be allowed for someone to pay $X for the source, and then
put it up on their own website and distribute it for free (with attribution,
and under GPL, etc) ?

>
> Regards,
> Joseph Earl
>
> -----Original Message-----
> From: address@hidden [mailto:
> help-gsl-bounces+joseph.earl06 <help-gsl-bounces%2Bjoseph.earl06>=
> address@hidden On Behalf Of Brian Gough
> Sent: 22 January 2010 15:30
> To: Vicent
> Cc: address@hidden
> Subject: Re: [Help-gsl] Permissions for using GSL in my own software
>
> At Sat, 16 Jan 2010 14:26:03 +0100,
> Vicent wrote:
> > But if I develop a software of my own and I register or patent it, am I
> > allowed to use GSL inside it???
> >
> > Sorry if this is a too easy question. Anyway, I would appreciate any
> > feedback.
>
> Information about the license: http://www.gnu.org/licenses/gpl-faq.html
>
> See also the brief description at http://www.gnu.org/software/gsl/
> under "Licensing"
>
>
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-- 
Carl Boettiger
Population Biology, UC Davis
http://two.ucdavis.edu/~cboettig