[seqfan] Cross-refs (retitled)

Wed Feb 11 22:33:49 CET 2015

I'm not disagreeing with that. I'm just pointing out how far we are 
 from doing it that way. I did at one point do some searches for "base" 
sequences that did not have the keyword, and corrected a few hundred of 
them. I'm not going to do something similar for the thousands of 
exceptions to this rule.

I guess the first step is for the editors to start uniformly enforcing 
the rule for both new and modified sequences.

Actually, I do object to cross-refs that, if all references of this 
sort were added, thousands of cross-refs would be added to a single 
sequence. Consider, for the moment, the effect of adding a cross-ref 
 from A000040 to every sequence that mentions primes. Hints are good, 
but not when you can't see the trees for the forest.

Franklin T. Adams-Watters

-----Original Message-----
From: Neil Sloane <njasloane at gmail.com>
To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
Sent: Wed, Feb 11, 2015 2:35 pm
Subject: [seqfan] Re: A marginal observation on some tables of R. H. 
Hardin

I cannot understand why there is ever an objection to
cross-references.

If you are using the OEIS for
what it chiefly intended for, its main purpose, which is to help
you (very often, me) understand a sequence that has come
up in your work, then any hint at all is potentially valuable.

A cross-reference is like someone whispering to you, "I don't know if it
will help, but did you look at A...... ? "

And they should all be listed in the cross-reference section,
so it is easy to find them.

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

On Wed, Feb 11, 2015 at 2:56 PM, Frank Adams-Watters 
<franktaw at netscape.net>
wrote:

> Just as a point of reference, a search for "A000217 -xref:A000217" 
gives
> 933 matches, out of 2699 that match "A000217".
>
> Franklin T. Adams-Watters
>
> -----Original Message-----
> From: Neil Sloane <njasloane at gmail.com>
> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
> Sent: Wed, Feb 11, 2015 1:41 pm
> Subject: [seqfan] Re: A marginal observation on some tables of R. H. 
Hardin
>
>
>  I forget.  But the main reason is for humans to be able to see at a 
glance
> what sequences are mentioned.
>
> 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
>
>
> On Wed, Feb 11, 2015 at 2:15 PM, Charles Greathouse <
> charles.greathouse at case.edu> wrote:
>
>  What part of Russ' code work improperly when a sequence is in an
>>
> entry but
>
>> not the xref field?
>>
>> Charles Greathouse
>> Analyst/Programmer
>> Case Western Reserve University
>>
>> On Wed, Feb 11, 2015 at 11:23 AM, Neil Sloane <njasloane at gmail.com>
>>
> wrote:
>
>>
>> > Just to clarify one point:
>> >
>> > The rule is that if there is a line anywhere in the entry that
>> > mentions A123456, then Cf. A123456 should also appear in the
>> > cross-references section.
>> >
>> > (there are two good reasons: so Russ's code works
>> > properly, and so the user can easily see if A123456 is
>> > referred to anywhere in the entry without having to search through
>>
> every
>
>> > line)
>> >
>> > 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
>> >
>> >
>> > On Wed, Feb 11, 2015 at 7:34 AM, Ron Hardin <rhhardin at att.net>
>>
> wrote:
>
>> >
>> > > I agree than any specific case can benefit from two-way links,
>>
> but not
>
>> in
>> > > general.  At least it seems that way to me.
>> > >
>> > >
>> > > I don't understand the first paragraph problem you describe 
below.
>> > > Clicking "refs" in the header of the table gives you a nice page
>>
> with
>
>> all
>> > > the rows and columns and diagonals expanded for you, as well as
>>
> any
>
>> > foreign
>> > > sequence that happens to reference inwards.
>> > >
>> > >
>> > > rhhardin at mindspring.com
>> > > rhhardin at att.net (either)
>> > >
>> > >
>> > > >________________________________
>> > > > From: M. F. Hasler <seqfan at hasler.fr>
>> > > >To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
>> > > >Sent: Wednesday, February 11, 2015 7:23 AM
>> > > >Subject: [seqfan] Re: A marginal observation on some tables of
>>
> R. H.
>
>> > > Hardin
>> > > >
>> > > >
>> > > >Ron,
>> > > >
>> > > >I am also personally against duplicating links (really never
>> > > >understood why an A-number put somewhere in comment or formula
>>
> should
>
>> > > >be repeated in Xrefs), but it is nonetheless handy to have the
>>
> links
>
>> > > >to the column sequences because else you have to do a search
>>
> with only
>
>> > > >the sequence number in order to find them via the backlink, but
>>
> often
>
>> > > >you come there following a link and not doing a search (and it 
is
>> > > >somehow counter-intuitive to copy-paste the number of the
>>
> sequence
>
>> > > >already displayed on the screen again into the search box...).
>> > > >
>> > > >Also, in the present case there was no link to the tables
>>
> A250676 and
>
>> > > >A250691 with almost identical definition, and they would not pop
>>
> up
>
>> > > >doing a search for the other sequence numbers.
>> > > >
>> > > >I also agree on the "significance" issue, and it is painfully to
>>
> have
>
>> > > >a bunch of sequence numbers in the Xrefs without knowing why
>>
> they are
>
>> > > >there. But with 2-3 words of explanation or just hints, this is
>>
> a true
>
>> > > >added value, I think.
>> > > >
>> > > >Maximilian
>> > > >
>> > > >
>> > > >On Wed, Feb 11, 2015 at 8:05 AM, Ron Hardin <rhhardin at att.net>
>>
> wrote:
>
>> > > >> The row/col/diag series always link to the table, so the refs
>>
> link
>
>> in
>> > > the table will find them.
>> > > >>
>> > > >> It always seemed like needless clutter to link the other way
>> without a
>> > > reason beyond existence.  It seems to claim significance beyond
>>
> that.
>
>> > > >>
>> > > >> The inbound links by contrast say that there are more like
>>
> this, in
>
>> > > this family.
>> > > >>
>> > > >>
>> > > >> rhhardin at mindspring.com
>> > > >> rhhardin at att.net (either)
>> > > >>
>> > > >>
>> > > >>>________________________________
>> > > >>> From: M. F. Hasler <seqfan at hasler.fr>
>> > > >>>To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
>> > > >>>Sent: Wednesday, February 11, 2015 6:48 AM
>> > > >>>Subject: [seqfan] Re: A marginal observation on some tables of
>>
> R. H.
>
>> > > Hardin
>> > > >>>
>> > > >>>
>> > > >>>I added your comment in A250544, and also several missing
>> > > >>>cross-references to sequences which list the rows/cols.
>> > > >>>It would be nice if others could edit related sequences in a
>>
> similar
>
>> > > manner.
>> > > >>>
>> > > >>>Maximilian
>> > > >>>
>> > > >>>
>> > > >>
>> > > >> _______________________________________________
>> > > >>
>> > > >> Seqfan Mailing list - http://list.seqfan.eu/
>> > > >
>> > > >
>> > > >
>> > > >
>> > > >
>> > > >_______________________________________________
>> > > >
>> > > >Seqfan Mailing list - http://list.seqfan.eu/
>> > > >
>> > > >
>> > > >
>> > >
>> > > _______________________________________________
>> > >
>> > > Seqfan Mailing list - http://list.seqfan.eu/
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>> >
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