On Mon, Jul 21, 2008 at 12:42 AM, William Stein <[EMAIL PROTECTED]> wrote: > > Hi Sage-Devel (cc: Markus), > > After emailing with Markus Hohenwarter -- director of Geogebra -- and > looking around at the code, I get the impression that the Geogebra group is > very well meaning and a great group of people doing some wonderful things > in math education. Unfortunately, it appears they are also possibly violating > the GPL in order to ensure complete control over their project (which > is something > the GPL doesn't allow). I want to emphasize that I think they are well > meaning > and aren't doing this out of any sort of evil intentions, and of > course I strongly > applaud their putting a lot of effort into open source math software and math > education, much of it likely voluntary. > > I think that Geogebra has to be GPL'd because it fundamentally depends on > the java version of the GPL'd yacas library (yacas = yet another computer > algebra system). On the other hand, it seems that the Geogebra folks > purposely > criple Geogebra by making the build system, language files (?), and > documentation > all non-GPL compatible. As a result it seems that one can't use > Geogebra under the > terms of the GPL. This might be a violation of the GPL. > > (Note that I wrote "seems" and "might" in several places above, since I'm > not really certain of anything. I could be just plain wrong!) > > So I don't think (optional) integration or support of Geogebra from > Sage is a wise move right now. I very much hope the situation with > Geogebra changes asap. I.e., in my opinion, the Geogebra group should > either make the Geogebra distribution fully GPL'd or they should replace > YACAS by another non-GPL'd component and switch to a license
Like by some BSD based component? :) Is the end result good for open source alternatives to Ma*? Ondrej --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
