[seqfan] Re: Maxima interface for OEIS

Maximilian Hasler maximilian.hasler at gmail.com
Mon Jan 26 19:07:19 CET 2009

I think in any case the developers to such well-known and wide-spread
CAS (as sage, haskell, maxima) should ask Neil for permission when
they include a corresponding package in their distribution (even if
it's not on the shipped CD but on their website).

Anyway, even if it's publicly available, this is copyrighted material (cf.
and thus subject to usual legislation.

In addition to asking permission, they should implement something like
displaying the OEIS copyright when the package is loaded or used for
the first time in a session.

Also, if it uses a static snapshot of the base, there should be a
disclaimer like "data as of ...".

W.r.t. denial of service attacks, I would suppose that the general web
server of AT&T already implements some protection against this...
(Rather than to implement a fixed delay between requests from the same
IP, a maximal quota of requests per minute should be imposed, since
there could be situations where it would be desirable to allow a
script to send a dozen of requests within a short delay, if this does
not do this for an extended time.)


On Mon, Jan 26, 2009 at 1:10 PM, Max Alekseyev <maxale at gmail.com> wrote:
> On Mon, Jan 26, 2009 at 1:56 AM, Giovanni Resta <g.resta at iit.cnr.it> wrote:
>> Max Alekseyev wrote:
>>> Neil,
>>> What's about a similar interface in Mathematica 7? Did they get a
>>> permission from you?
>> Where is the similar interface in Mathematica 7 ?
>> I only know FindSequenceFunction[] that does not seem to be related to OEIS.
> Oh, my memory may have tricked me. I thought I was seeing an interface
> for OEIS in M7.
> Anyway, there other OEIS interfaces exist, e.g.:
> Math.OEIS for haskell:
> http://hackage.haskell.org/packages/archive/oeis/0.2/doc/html/Math-OEIS.html
> sage.databases.sloane in SAGE:
> http://www.sagemath.org/doc/ref/module-sage.databases.sloane.html
> etc. etc.
> I'm just curious whether each such interface should have a permission from Neil.
> For me such interfaces look like just a slightly different way to
> access OEIS, not stealing any intellectual rights.
> If there is no need to request a permission for using any particular
> browser (IE, Firefox, Chrome, Opera etc.) to access OEIS, why there is
> such a need for using math software instead of a browser?
>>> From technical perspective, I would prefer Maxima accessing the
>>> current version of OEIS online, rather than having its offline local
>>> copy.
>> That would be dangerous (it would make easier to perform, say, 1000
>> queries in a second) and in my opinion that would surely need a permission.
> There can be implemented a reasonable delay between subsequent queries to OEIS.
> Of course, we don't want someone unintentionally performing
> denial-of-service attack on OEIS.
> Regards,
> Max
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