[seqfan] Re: Additional keywords for OEIS

[Matthijs Coster]

I would like keywords such that only sequences can be searched which are 
increasing, non decreasing, consist of different integers. That would be 
wonderful!

Matthijs Coster

Charles Greathouse schreef op 20-2-2015 om 20:47:
> I like the idea of new keywords, and I like the idea of categories.
> Categories seem like a great solution to many problems because they would
> be (by design) extendable. Unfortunately I haven't had time to look though
> this part of Russ' code, but I intend to work on this eventually.
>
> Charles Greathouse
> Analyst/Programmer
> Case Western Reserve University
>
> On Fri, Feb 20, 2015 at 12:24 PM, Neil Sloane <njasloane at gmail.com> wrote:
>
>> Instead of adding more keywords, which are necessarily
>> rather limited, Charles and I had discussed adding
>> "categories".  This may be a better way to proceed.
>> Charles, did you think any more about how this idea might be implemented?
>> IIRC, you started to learn Go for that purpose?
>>
>> 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 Fri, Feb 20, 2015 at 1:18 PM, Frank Adams-Watters <
>> franktaw at netscape.net>
>> wrote:
>>
>>> While I'm not familiar with the code being used, making new keywords
>>> available can't be very difficult.
>>>
>>> Getting the keyword assigned to all and only those sequences where it
>>> belongs is another matter, ranging from a bit trickier than you might
>> think
>>> to requiring many man-hours. For the example below, the process could be
>>> automated with 99%+ accuracy. I don't know of any off hand, but there are
>>> probably sequences in the database whose first non-prime member comes
>> quite
>>> late. The process also has to be able to deal with sequences having very
>>> large terms. One keyword I have considered, "fact", for those sequences
>>> which depend on factorization, in the same way that "base" sequences
>> depend
>>> on representation as numerals, would be very difficult to get anywhere
>>> close to being right.
>>>
>>> Franklin T. Adams-Watters
>>>
>>>
>>> -----Original Message-----
>>> From: Felix Fröhlich <felix.froe at googlemail.com>
>>> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
>>> Sent: Fri, Feb 20, 2015 5:10 am
>>> Subject: [seqfan] Additional keywords for OEIS
>>>
>>>
>>> Dear SeqFans,
>>>
>>> as some of you might know, there has been some discussion about the
>>> addition of additional keywords to the OEIS. Most of what I found
>> regarding
>>> that discussion has taken place in the userspace of Charles Greathouse in
>>> the OEIS Wiki. See
>>> https://oeis.org/wiki/User_talk:Charles_R_Greathouse_IV/Keywords and
>>> https://oeis.org/wiki/User:Charles_R_Greathouse_IV/Keywords/Table and
>> the
>>> corresponding talk pages.
>>>
>>> Personally I think the possibility to refine OEIS searches via specific
>>> keywords is very useful and I often make use of that feature. The
>> addition
>>> of new keywords would allow one to get even more relevant results. For
>>> example, Alex Ratushnyak in 2013 suggested the addition of a keyword
>> 'prim'
>>> that would allow one to find all sequences where all terms are prime. Two
>>> obvious candidates for this keyword would be sequences like A000040
>>> or A000043.
>>>
>>> As I am not familiar with the technical aspects behind the OEIS
>> database, I
>>> would like to know how much work it would be to add new keywords to the
>>> OEIS or whether it is technically possible at all (maybe it's just like
>>> running an SQL query to update some database table, or maybe it requires
>>> some complete rewrite of some part of the software underlying the OEIS, I
>>> do not know). If it is technically feasible to do this and if those who
>>> maintain the technical integrity of the OEIS think such a step would be
>>> desirable, then as a next step we could collect suggestions regarding
>> which
>>> keywords would be useful.
>>>
>>> What do others think?
>>>
>>> Best regards
>>>
>>> Felix Fröhlich
>>>
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