On Fri, Jan 22, 2016 at 2:29 AM, Dima Pasechnik <dimp...@gmail.com> wrote: > > > On Thursday, 21 January 2016 07:16:45 UTC, Jeroen Demeyer wrote: >> >> On 2016-01-21 00:29, Dima Pasechnik wrote: >> > Surely, if the official nauty got another licence it would have solved >> > the problem easier. >> >> Maybe you could ask McKay if he is willing to license *every* version of >> nauty (past and future) with a GPL-compatible license? If we are only >> allowed to ship one specific version of nauty in Sage, we should not >> make it standard since it won't be maintainable. > > > I have asked, and here is his proposed licence for 2.6: > (I have asked him to deal with part D better, too) > > > This is the copyright notice for the software package Nauty and > Traces, versions 2.6 and later. > > Four categories of software are included in the package: > A. All files not listed as B-D below, copyright Brendan McKay (1984-) > B. Files traces.h and traces.h, copyright Adolfo Piperno (2008-) > C. File watercluster2.c, copyright Gunnar Brinkmann (2009-) > D. Files planarity.h and planarity.c, copyright Magma project > (University of Sydney) >
Can planarity.h and planarity.c be removed from the Sagemath version of nauty? > Regarding files in classes A, B and C: > Permission is hereby given for the use, distribution and > modification of this software subject to the following. > * You must include this copyright notice with all distributed > copies of this software, including modified copies. > * You must clearly mark modified versions of this software > as differing from the original. > > Regarding files in class D: > Permission should be sought from the Magma project. > > Regarding all the files in the package: > This software is only provided "as is". No guarantee is made > as to the suitability of this software for any purpose. No > responsibility will be taken by the authors or their employers > for any misfortune which befalls you because of its use. Your > use of this software implies your agreement with this notice. > > Brendan McKay: Australian National University; brendan.mc...@anu.edu.au > Adolfo Piperno: University of Rome "Sapienza"; pipe...@di.uniroma1.it > Gunnar Brinkmann: University of Ghent; gunnar.brinkm...@ugent.be > > ---END-OF-FORMAL-COPYRIGHT-NOTICE--- > > Earlier (pre-2.6) versions of this package carried a different > notice: "Permission is hereby given for use and/or distribution > with the exception of sale for profit or application with nontrivial > military significance." These days most people use nauty via a > larger package such as Magma, Sage, or GAP, and often they don't > even know they are using nauty. Due to the legal nonsense that > large package distributors need to worry about, it has proved too > much trouble to maintain an idiosyncratic licence. I didn't change > my opinion about military use, but it is no longer part of the > formal notice. Brendan McKay (Jan 20, 2016) > > >> >> >> Jeroen. > > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To post to this group, send email to sage-devel@googlegroups.com. > Visit this group at https://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
