[seqfan] Re: automatic cross-refence

Martin Fuller martin_n_fuller at btinternet.com
Tue Mar 3 15:35:40 CET 2009

--- On Tue, 3/3/09, Max Alekseyev <maxale at gmail.com> wrote:
> From: Max Alekseyev <maxale at gmail.com>
> Subject: [seqfan] Re: automatic cross-refence
> To: "Sequence Fanatics Discussion list" <seqfan at list.seqfan.eu>
> Date: Tuesday, 3 March, 2009, 2:37 AM
> On Mon, Mar 2, 2009 at 9:17 PM, Dmitry Kamenetsky
> <Dmitry.Kamenetsky at nicta.com.au> wrote:
> > Dear Seqfans,
> >
> > I often see two sequences A and B, where A references
> B, but B does not
> > reference A. This means that a person reading B will
> have a hard time
> > finding A.
> Not a problem at all - a regular search of B in the OEIS
> will return,
> in particular, the sequence A (since it contains a
> reference to B in
> its body).
> Is it possible to have an automatic cross-reference engine
> > that completes these missing references? The idea is
> the following, for
> > each pair (A, B):  if A->B exists, but B->A
> doesn't exist then add a
> > cross-reference to A from B.
> This idea was discussed a couple of times before.
> A short answer is NO, it won't work.
> The problem is that some sequences are highly referenced
> and
> referencing back every sequence will blow up them.
> Here is example: A000040 is referenced by more than 2,500
> sequences -
> just imagine how much space it would take to reference them
> all back.
> Regards,
> Max

How about a link from each sequence to the regular search Max suggested?  I would find that useful when I am browsing quickly, because I don't always remember how powerful the search engine can be.  Has this been discussed before?

Martin Fuller

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