[SciPy-Dev] cubature license

Saullo Castro saullogiovani@gmail....
Sun Aug 25 01:40:09 CDT 2013


@Warren

from the good disccusion here (
http://matplotlib.org/devel/license.html#license-discussion)
it seems that the biggest difference between the GPL and the BSD is that
the former requires you to distribute your source code, and the BSD allows
you to do whatever you want...

I don't see the problem to include it in SciPy, since the source code is
always distributed. Even if third part companies like Enthought are using
it, it is more like a module, isn't it? and the core code behind it can
still be BSD  based.

Anyway, the software has a `clencurt_gen.c` stand-alone program which does
not have to be used unless the user whant a `p-adaptive` cubature with more
than 8193 points per dimension, this type of cubature applies
"p-refinement" (increase of interpolation function order) instead of
"h-refinement" (splitting the interval). I don't see a need to include this
program in the SciPy cubature. We can implement this restriction in the
wrapper.

I will ask Steven Johnson about this, if removing this part could make
cubature re-licensable to BSD.

Greetings!
Saullo


2013/8/24 <scipy-dev-request@scipy.org>

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> Today's Topics:
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>    1. Re: cubature license (Robert Kern)
>    2. Re: cubature license (Warren Weckesser)
>    3. Re: cubature license (Warren Weckesser)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 24 Aug 2013 16:53:10 +0200
> From: Robert Kern <robert.kern@gmail.com>
> Subject: Re: [SciPy-Dev] cubature license
> To: SciPy Developers List <scipy-dev@scipy.org>
> Message-ID:
>         <
> CAF6FJivScnjqnAZO8OJ0XZpJ48+KsC5rdOmE+5z-EWWJn7iH_g@mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> On Sat, Aug 24, 2013 at 4:47 PM, Warren Weckesser <
> warren.weckesser@gmail.com> wrote:
> >
> > On 8/24/13, Saullo Castro <saullogiovani@gmail.com> wrote:
> > > @Alex,
> > >
> > > you are right, "it uses some GPL code from other projects (Hintlib and
> > > GSL).
> > > "
> > >
> > > But is it really impossible to include it in SciPy because of that?
> >
> > Yes.  We do not include GPL-licensed code in SciPy.  I haven't looked
> > at the Cubature code, so I don't know the extent to which it uses
> > HIntLib and GSL, but based on the comment on the web page, it is
> > unlikely that Steven Johnson can re-license his code with a license
> > that is compatible with SciPy.  The GPL is viral that way (insert the
> > usual "I am not a lawyer" disclaimer here).
>
> It's not quite as viral as that. He can license the code that he himself
> wrote under whatever license he likes as long as it is compatible with the
> GPL license of the other libraries that he is combining his code with. If
> the code that he wrote is separable from HIntLib and GSL by rewriting that
> functionality, he can distribute his code under the BSD license for
> inclusion in SciPy.
>
> --
> Robert Kern
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> ------------------------------
>
> Message: 2
> Date: Sat, 24 Aug 2013 11:04:51 -0400
> From: Warren Weckesser <warren.weckesser@gmail.com>
> Subject: Re: [SciPy-Dev] cubature license
> To: SciPy Developers List <scipy-dev@scipy.org>
> Message-ID:
>         <
> CAGzF1ufwXi4UoGeCwvBN1HCJbigGKtpYisM8KFEc9n5NAhyNtA@mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On 8/24/13, Robert Kern <robert.kern@gmail.com> wrote:
> > On Sat, Aug 24, 2013 at 4:47 PM, Warren Weckesser <
> > warren.weckesser@gmail.com> wrote:
> >>
> >> On 8/24/13, Saullo Castro <saullogiovani@gmail.com> wrote:
> >> > @Alex,
> >> >
> >> > you are right, "it uses some GPL code from other projects (Hintlib and
> >> > GSL).
> >> > "
> >> >
> >> > But is it really impossible to include it in SciPy because of that?
> >>
> >> Yes.  We do not include GPL-licensed code in SciPy.  I haven't looked
> >> at the Cubature code, so I don't know the extent to which it uses
> >> HIntLib and GSL, but based on the comment on the web page, it is
> >> unlikely that Steven Johnson can re-license his code with a license
> >> that is compatible with SciPy.  The GPL is viral that way (insert the
> >> usual "I am not a lawyer" disclaimer here).
> >
> > It's not quite as viral as that. He can license the code that he himself
> > wrote under whatever license he likes as long as it is compatible with
> the
> > GPL license of the other libraries that he is combining his code with. If
> > the code that he wrote is separable from HIntLib and GSL by rewriting
> that
> > functionality, he can distribute his code under the BSD license for
> > inclusion in SciPy.
>
>
> Yes--thanks for the clarification.
>
> Warren
>
>
> >
> > --
> > Robert Kern
> >
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 24 Aug 2013 11:16:16 -0400
> From: Warren Weckesser <warren.weckesser@gmail.com>
> Subject: Re: [SciPy-Dev] cubature license
> To: SciPy Developers List <scipy-dev@scipy.org>
> Message-ID:
>         <
> CAGzF1uezSbAmsWNwSyfRug5tz08UA1pe7pUeeBYVE1tmykSWrw@mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On 8/24/13, Warren Weckesser <warren.weckesser@gmail.com> wrote:
> > On 8/24/13, Robert Kern <robert.kern@gmail.com> wrote:
> >> On Sat, Aug 24, 2013 at 4:47 PM, Warren Weckesser <
> >> warren.weckesser@gmail.com> wrote:
> >>>
> >>> On 8/24/13, Saullo Castro <saullogiovani@gmail.com> wrote:
> >>> > @Alex,
> >>> >
> >>> > you are right, "it uses some GPL code from other projects (Hintlib
> and
> >>> > GSL).
> >>> > "
> >>> >
> >>> > But is it really impossible to include it in SciPy because of that?
> >>>
> >>> Yes.  We do not include GPL-licensed code in SciPy.  I haven't looked
> >>> at the Cubature code, so I don't know the extent to which it uses
> >>> HIntLib and GSL, but based on the comment on the web page, it is
> >>> unlikely that Steven Johnson can re-license his code with a license
> >>> that is compatible with SciPy.  The GPL is viral that way (insert the
> >>> usual "I am not a lawyer" disclaimer here).
> >>
> >> It's not quite as viral as that. He can license the code that he himself
> >> wrote under whatever license he likes as long as it is compatible with
> >> the
> >> GPL license of the other libraries that he is combining his code with.
> If
> >> the code that he wrote is separable from HIntLib and GSL by rewriting
> >> that
> >> functionality, he can distribute his code under the BSD license for
> >> inclusion in SciPy.
> >
> >
> > Yes--thanks for the clarification.
> >
> > Warren
> >
>
>
> P.S.:  Saullo, here are a couple links to more information about
> compatible licenses:
> http://wiki.scipy.org/License_Compatibility
> http://matplotlib.org/devel/license.html#license-discussion (the
> discussion of the matplotlib license is applicable to scipy)
>
> Warren
>
> >
> >>
> >> --
> >> Robert Kern
> >>
> >
>
>
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