|[eigen] Fwd: Re: tvmet: licensing question for a project based on tvmet source code|
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Just for the record, I forward Olaf's mail. -Benoit ---------- Forwarded Message ---------- Subject: Re: tvmet: licensing question for a project based on tvmet source code Date: Saturday 09 June 2007 From: Olaf Petzold <tvmet@xxxxxx> To: Benoît Jacob <jacob@xxxxxxxxxxxxxxx> Hello Benoît , > Hello Olaf, > > I'm developing a software project, Eigen2, that is based on tvmet 1.7.1 source > code. To be precise, Eigen2 is a C++ template library for linear algebra, and > many of its own source files are taken from tvmet. In a sense, you could say > it's a "fork" of tvmet, but in a very positive sense. I am mixing together > code from three different existing libraries (tvmet, eigen1, gmm++) in order > to hopefully create an even better linear algebra library. > hopefully this will close the gape for the linear algebra packages for small sizes. tvmet miss some functionality like lu decompostion etc. I never found the time to implement this (tvmet was developed over a couple of years). > I am writing this to ask for your confirmation that I am allowed to > redistribute Eigen2 under the plain unmodified GNU LGPL license. > > I have seen that tvmet has an addendum to the LGPL. This addendum contains an > advertising clause (Clause 5). I want to redistribute Eigen2 without any > advertising clause. I _will_ advertise tvmet very generously on the Eigen > website and documentation. Actually, I am already advertising tvmet on > Eigen's website (eigen.tuxfamily.org). But while _I_ am perfectly fine with > advertising tvmet, I don't want to force _Eigen's users_ to do so. > Advertising clauses also lead to many licensing problems on which I could > elaborate. > > As far as I can see, it isn't said anywhere that the addendum itself must be > kept in derivative works. So there are chances that I didn't even need to > write this e-mail. However, there are also chances that I do need your > confirmation, so I would feel relieved to read back from you. Mmh, the advertising clause has the task to advertise tvmet. The goal is clear I think. tvmet is well know but I never found a final software which used it. This is the other point. Well, I think Eigen2 derived from tvmet mentioned (with URL) at your home page (as you did before), this should be enough. Can you live with it? Cheers, Olaf -------------------------------------------------------
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