[seqfan] Re: All links to private pages will break, we should get copies before they do

Neil Sloane njasloane at gmail.com
Sun Dec 22 14:09:55 CET 2019


I have written to Dan Gordon (an old friend) to ask him to help.




On Sun, Dec 22, 2019 at 6:36 AM Hugo Pfoertner <yae9911 at gmail.com> wrote:

> Neil, SeqFans,
>
> the matter is actually delicate, especially if a broken link is not just a
> single file, but a website with a possibly branched hierarchy of subpages.
> The same applies if the page contains active content or input fields.
> Inspired by a find from Georg Fischer, I have now discovered that the
> webpages ccrwest.org no longer exist. There are numerous references to
> them
> because the "La Jolla Covering Repository" was stored there, and also e.g.
> the list of "Cyclic difference sets". In this case the pages seem to have
> been taken over by Dan Gordon and the question now is whether it is better
> to use a wayback link, e.g.,
>
> http://web.archive.org/web/20180826015142/https://www.ccrwest.org/cover.html
> or to switch to the Dan Gordon version
> https://www.dmgordon.org/cover/
>
> There are about 50 links in total on ccrwest.org, and the question arises
> whether it makes sense to manually change them all individually.
>
> Hugo Pfoertner
>
> On Sat, Dec 14, 2019 at 9:22 PM Neil Sloane <njasloane at gmail.com> wrote:
>
> > This is a delicate business, because
> >
> > 1. we don't want to save a page unless we make every effort to get
> > permission first,
> >
> > 2.  we don't want to preserve junk.
> >
> > But it is clear that any private web page will break before long (and
> many
> > pages from organizations will also break, of course).
> >
> > So if someone adds a link to a private page that has good stuff about a
> > sequence, then as a routine matter we should ask if we can make a cached
> > copy for our server.
> >
> > Best regards
> > Neil
> >
> > Neil J. A. Sloane, President, OEIS Foundation.
> > 11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
> > Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
> > Phone: 732 828 6098; home page: http://NeilSloane.com
> > Email: njasloane at gmail.com
> >
> > --
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
> --
> Seqfan Mailing list - http://list.seqfan.eu/
>



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