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

[Nathann Cohen]

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.

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
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