I am one of the authors of braid and mapclass, but I cannot answer why sage tries to load braid. In 2012 there was some talk about porting braid to sage and I believe that perhaps David Joyner wanted it ported. At least his name was mentioned in the correspondence. Dima Pasechnik also played some role. Dima, do you remember anything?
Sergey ________________________________________ From: forum-boun...@gap-system.org [forum-boun...@gap-system.org] on behalf of Alexander Konovalov [alexander.konova...@st-andrews.ac.uk] Sent: Saturday, January 14, 2017 8:19 PM To: Max Horn Cc: z0608224008...@rezozer.net; GAP Forum Subject: Re: [GAP Forum] GAP package: braid > On 14 Jan 2017, at 20:10, Max Horn <m...@quendi.de> wrote: > > Dear Jerome, > > for some reason I only received your email yesterday -- presumably it was > stuck in mailing list moderation? Anyway, better a late answer than non at > all :-). Yes - I've looked at moderating requests yesterday and discovered it there. > >> On 07 Dec 2016, at 16:57, Jerome BENOIT <z0608224008...@rezozer.net> wrote: >> >> Hello Forum, >> >> I have just noticed that Sage[Math] tries to pre-loads the GAP package >> `braid', >> which is not present in the GAP webpage. I guess it is an old GAP package. >> Can anybody confirm this ? Does anybody knows whether or not this GAP pachage >> has been replaced/supersedeed ? > > To the best of my knowledge, GAP never bundled a "braid" package. There is an > undeposited "package" with that name, see > <https://www.gap-system.org/Packages/undep.html>, but (a) that never was > shipped together with GAP, Yes, that's true. In addition, the MapClass package (https://www.gap-system.org/Packages/mapclass.html) redistributed with GAP says that it is "an extension of the Braid package for GAP" but it does not require Braid to work. > and (b) as far as I can tell, it is just a bunch of GAP source files, not an > actual GAP package (i.e. no PackageInfo.g, init.g, read.g etc.). Well, that > said, there is also a broken link which purports to contain a "proper" > package, but it points to a location on www.opensourcemath.org, and that > domain expired and was taken over by a domain grabber placing ads on it. > > Anyway, if you want to find out why Sage tries to load that package, perhaps > ask them? And/or query their version control system to see when (and by whom) > the code to load the package was added. Perhaps authors of Braid and MapClass, if they read the Forum, could give more light too. HTH Alexander _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum
