Disappointed. That's about as controversial as the pope being a catholic. Bill.
On Wednesday, 17 August 2016 07:02:16 UTC+2, William wrote: > > > http://ask.sagemath.org/question/34442/can-i-create-commercial-software-using-sagemath > > > I put: "ANSWER: It depends on what you mean by "commercial software". > > ONE: If by "commercial software" you mean "closed source", then the > answer is no, you can't write and publicly distribute such software > legally. > > If you write a program that genuinely uses the Sage library in a > nontrivial way, then that program is a derived work of Sage and must > be distributed under the GPL (after all, there is no possible way to > run the program without calling many functions in Sage). > > When I started Sage, I took PARI -- a GPL'd program -- and started > building Sage on top of that. I was forced to GPL Sage because it was > a derived work of PARI. It's the same principle at work. Sage is very > much a LIBRARY, not just a programming language. > > We (Sage developers) also cannot sell or provide you with an > exception, because Sage itself depends on many GPL'd programs that we > do not own the copyright to. > > TWO: If by "commercial software" you mean software that makes money", > then yes, it is possible to build commercial software on top of GPL'd > software such as Sage. E.g., SageMathCloud is commercial (it makes > money) but is GPL'd. The Linux operating system is also GPL'd but > there are companies (like RedHat and Ubuntu) that make money from that > software." > > > -- > William (http://wstein.org) > -- 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.
