Possibly it makes sense to send a friendly invitation to contribute. It would seem to me that this would be a win for both parties.
(I have no idea how many people there are behind mathcad) Best wishes, Martin On Thursday 4 July 2024 at 07:01:54 UTC+2 axio...@gmail.com wrote: > I find it hard to believe there is an objection to using software > and making modification without submitting patches. > > On Wednesday, July 3, 2024 at 9:23:11 PM UTC-4 Waldek Hebisch wrote: > >> On Thu, Jul 04, 2024 at 08:21:35AM +0800, Qian Yun wrote: >> > >> > >> > On 7/4/24 06:41, Waldek Hebisch wrote: >> > > On Wed, Jul 03, 2024 at 11:18:05PM +0200, Ralf Hemmecke wrote: >> > > > On 7/3/24 12:19, Qian Yun wrote: >> > > > > Well, generally this feels a bit strange on multiple levels: >> > > > > 1. they use such an old version >> > > > > 2. they don't send bugs or upstream fixes to us >> > > > >> > > > Citing item 2 of our Licence.txt >> > > > >> > > > - Redistributions in binary form must reproduce the above copyright >> > > > notice, this list of conditions and the following disclaimer in >> > > > the documentation and/or other materials provided with the >> > > > distribution. >> > > > >> > > > Honestly, just looking at their website, I do not even see FriCAS >> mentioned >> > > > at all in an easily accessible form. I find this inaccaptable. >> > > > >> > > > I do not have "the distribution", but if it comes without >> explicitly >> > > > reproducing our Licence conditions, then we should certainly react. >> > > >> > > Assuming that ')copyright' works in their copy of FriCAS I think that >> > > they are covered from legal side (IANAL). And assuming that they keep >> > > normal FriCAS banner (identifying binary as FriCAS and giving info >> about >> > > ')copyright') that looks more or less OK. >> > >> > There were bugs with ')copyright' on windows in older releases. >> > But their release only includes "algebra/" and "AXIOMSys.exe", >> > no "etc/" or "share/", so may not include our copy of license. >> > Or they could hide it in their lengthy EULA, or maybe not. >> >> To comply with the our license, they should have text of the >> license _somewhere_. Recursive grep for 'Numerical ALgorithms Group' >> should find it (unless it is really obfuscated in some way). >> >> > The banner is fully shown, unmodified. >> >> I guess that given name interested folks can use Google to find >> FriCAS license. But I do not think that internet counts as >> 'materials provided with the distribution'. >> >> > > Concerning bug fixes and patches, in relative terms we got infintely >> > > more from Sage folks, but contribution from Sage folks is rather >> > > small part of overall contributions to FriCAS. So I am not >> > > surprised that there are no visible conftibution from Mathcad. >> > > >> > >> > Sage doesn't develop new domains, MathCAD does. So they are more likely >> > to hit by bugs. >> >> Not clear to me. Usig Spad code means that they may be affected >> by bugs in the Spad compiler. OTOH for simple constructs Spad >> compiler was quite reliable. And using Spad they are less >> affected by interpreter bugs. >> >> > But as for the "82 new domains" I mentioned above, there is >> > "EXPR.NRLIB", looks like it is modified for MathcadDisplayCategory. >> > Other than that, all new domains, which means they really do not >> > have an internal bug fix tree. >> >> We do not know. In principle they could patch implementations, >> that would not change generated databases. If you want to >> know you could try testcases for fixed bugs. >> >> Much depends on what they actually use. Some things, like basic >> operations on polynomials with integer/rational coefficients are >> quite stable, and I do not remember any related bugs. Other things >> may be worked around in wrappers. >> >> One, likely possibility is that they developed what they need >> around 2018 and keep using essentially the same thing. >> >> -- >> Waldek Hebisch >> > -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to fricas-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/fricas-devel/f12ff449-3773-4c49-a5cd-db0c8fed9a64n%40googlegroups.com.
