[Scip] License issues raised by a future interface between SCIP and Sage

[Gerald Gamrath]

Dear Dima,

your email did not come through, since you are not registered on the 
mailing list. But it might be better to further discuss this off the 
list anyway.

I don't yet understand the problem with asking the users to download 
from our website directly. Google's or-tools do a similar thing, you 
have to download the tarball and put it to a certain directory if you 
want to have SCIP included in or-tools. Or do you want to do this 
interactively within your install routine?

The other thing is the usage tracking, in particular we are always happy 
if people submit their name and affiliation at our download web 
interface, so we can see where in the world SCIP is used.

Do you think it would really be much better to integrate this into your 
install routine? Perhaps you can just provide the link in the 
installation, people download it themselves and then select the 
downloaded tarball in a dialog before they can proceed?

Best,
Gerald

On 01.07.2015 10:22, Dima Pasechnik wrote:
> Dear Thorsten,
>
> On 1 July 2015 at 08:55, Nathann Cohen <nathann.cohen at gmail.com> wrote:
>> Dear Thorsten,
>>
>> Thank you for your answer.
>>
>> This will probably complicate things for us, and if we end up writing
>> this interface we will be likely to ask users to download the tarball
>> from your website directly.
>>
> IMHO this is a huge obstacle, especially given that this would need to be
> working on different web browsers, etc.
>
> An alternative would be to have an installer that asks the user to
> acknowledge the licence,
> and aborts if she declines.
> This however would require a way to download the tarball in a
> non-interactive way.
>
> Would ZIB be willing to work out a way to do the latter?
> Perhaps, a password-protected archive?
>
> Thanks,
> Dima
>
>> Regards,
>>
>> Nathann
>>
>> On 1 July 2015 at 07:15, Thorsten Koch <koch at zib.de> wrote:
>>> Dear Nathann,
>>>
>>> nice to hear that SAGE will get an SCIP interface.
>>>
>>> Looking at the SCIP Academic License
>>> http://scip.zib.de/academic.txt
>>> there seem to be two problems:
>>>
>>>> - We would like to host a *copy* of the source tarball
>>>> (scipoptsuite-3.1.1.tgz)
>>>>    on our servers (anybody would be able to download it from there)
>>>>
>>> the license states that you have to track usage.
>>>
>>>> - Users could "download and install" this copy by running "sage -i scip"
>>>>
>>> In this case you would have to ensure that people notice and acknowledge that
>>> they use SCIP under the Academic License, which excludes any commercial
>>> usage.
>>>
>>> Best regards,
>>> Thorsten
>>>
>>>
>>> Am 30.06.15 um 18:01 schrieb Nathann Cohen:
>>>> Helloooooo everybody,
>>>>
>>>> I am contributor to a software called Sage [1], meant for general
>>>> mathematics. We already have interface between Sage and other LP solvers
>>>> (GLPK,
>>>> CPLEX, Gurobi, ...) and we would like to interface it with SCIP in the
>>>> future
>>>> [2].
>>>>
>>>> I would like to make sure that your license is compatible with our
>>>> distribution
>>>> system:
>>>>
>>>> - Sagemath is licensed under the GPLv3+. Thus, SCIP cannot be part of Sage
>>>> (nor
>>>>    part of its source tarball) and we want it to become an 'optional
>>>> package'.
>>>>
>>>> - We would like to host a *copy* of the source tarball
>>>> (scipoptsuite-3.1.1.tgz)
>>>>    on our servers (anybody would be able to download it from there)
>>>>
>>>> - Users could "download and install" this copy by running "sage -i scip"
>>>>
>>>> - Some python files in Sage (under GPLv3+ license), part of the standard
>>>> Sage
>>>>    distribution (but rather useless unless your package is installed), would
>>>> be
>>>>    our way to use your code (as an independent binary file, or as a shared
>>>>    library).
>>>>
>>>> Do you see anything in this description that would go against your wishes,
>>>> or
>>>> against your license?
>>>>
>>>> Thanks,
>>>>
>>>> Nathann
>>>> http://www.steinertriples.fr/ncohen/
>>>>
>>>> [1] http://www.sagemath.org/
>>>> [2] http://trac.sagemath.org/ticket/10879
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Scip mailing list
>>>> Scip at zib.de
>>>> http://listserv.zib.de/mailman/listinfo/scip
>>>>
>>> --
>>> The important thing is not to stop questioning.
>>> Curiosity has its own reason for existing.          -- Albert Einstein
>>> ______________________________________________________________________
>>> Prof. Dr. Thorsten Koch /       Technische Universität Berlin
>>> www.zib.de/koch        /                   and
>>> koch at zib.de           /          Zuse Institute Berlin (ZIB)
>>> _____________________/       Takustraße 7, 14195 Berlin, Germany
>>>         and also                Phone +49-30-84185-213, Fax -269
>>> KOBV : Kooperativer Bibliotheksverbund Berlin Brandenburg
>>> digiS: Servicestelle Digitalisierung des Landes Berlin
>>> ______________________________________________________________________