[seqfan] Proposal for better presentation of some sequences with complex numbers
mrob27 at gmail.com
Sat May 28 09:17:01 CEST 2011
franktaw's idea (if I interpret it correctly) is to have a database of
"formulas" with "F-numbers" (the F is for formula), and each formula refers
to one or more sequences (which have A-numbers).
Franklin's idea can be implemented separately from the OEIS, which is why I
think it's a better approach. It doesn't require any keywords or user
interface to be added to OEIS.
It is also more versatile, because you can do a lot more with a formula than
you can do with keywords. If necessary, the "formula" could be a multi-line
program in some language like Maxima or PARI/GP.
The formula database could also include source code to organize and/or
present the numbers in a two-dimensional way, to handle your triangle and
complex examples. The source code could be in a language that has plotting
capability, if needed.
On Fri, May 27, 2011 at 17:25, Maximilian Hasler <
maximilian.hasler at gmail.com> wrote:
> Another earlier suggestion of mine which could realize the same
> and might be easier to implement, was that of extended keywords:
> This would be extremely easy to implement, maybe one single line in
> the output formatting script, and no change at all to the database
> (assuming that the kw length of 4 characters isn't hardwired anywhere)
> [except for progressively completing the extended keywords].
> On Fri, May 27, 2011 at 4:42 PM, <franktaw at netscape.net> wrote:
> > Some time back, I proposed adding F numbers, which would provide a
> > way to show not only fractions and complex numbers, but also irregular
> > tables, two-way infinite sequences, sequences defined on fractions and
> > complex numbers, and a number of other things. The reaction at the time
> > underwhelming, but I still think it's a good idea. Note that with this
> > proposal, one would be able to search for these things as well.
> > The basic idea is to have a database with definitions, like
> > "A000010/A000027". This could include comments, formulae, everything
> > actual values and (in some cases) offsets; the sequence contents,
> > b-file equivalents, would then be automatically generated.
> > Implementing this would be a major project, I admit.
> > Franklin T. Adams-Watters
Robert Munafo -- mrob.com
Follow me at: fb.com/mrob27 - twitter.com/mrob_27 - mrob27.wordpress.com-
youtube.com/user/mrob143 - rilybot.blogspot.com
More information about the SeqFan