On Sat, Jan 14, 2017 at 09:48:42PM +0000, Sergey Shpectorov wrote: > 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? sure: see e.g. https://trac.sagemath.org/ticket/13211#comment:15 We'll swap braid with mapclass https://trac.sagemath.org/ticket/22190
By the way, most of webpage links on https://gap-system.org/Packages/mapclass.html are not working. Cheers, Dima > > 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
