Hi all!
I am in need of browsing through all the statistics on permutations and
derangements, and wanted to use combinatorial_statistics_in_class, but I
can't find it anymore...
What should I be using?
All the best,
Martin
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Hi Christian!
thanks for the fast reply -- but I need statistics, not maps. I..e, I'd
like to have a list of all methods applying to permutations that return a
number...
Is it correct that findstat implements more statistics and more maps? Is
it possible to use findstat from within sage?
Ma
Am Dienstag, 27. Mai 2014 12:10:22 UTC+2 schrieb Viviane Pons:
>
>
>> thanks for the fast reply -- but I need statistics, not maps. I..e, I'd
>> like to have a list of all methods applying to permutations that return a
>> number...
>>
>
> I don't think there is anything like that for statistic
>
> So if you have some use cases for combinatorial maps, please write about
> it so such cases are also visible.
>
One use case for statistics which comes to my mind immediately is to
provide answers to
http://mathoverflow.net/questions/101265/a-list-of-symmetric-statistics/101670#101670
>
> > Besides: is it possible to run a "more exhaustive" FindStat search? If
> I understand correctly, FindStat limits itself to 3 maps, right?
>
> No -- you can change the 3 into a 5 at most. And the at most is just a
> limit to not run for too long, so if you are willing to wait
> overnight
Am Dienstag, 27. Mai 2014 20:56:58 UTC+2 schrieb Nathann Cohen:
>
> Hello !!!
>
> > I must say that I'd love to see the findstat search engine as part of
> sage.
>
> I would love it too. Querying the findstat database from within Sage
> is clearly a good thing.
>
But only half of the story.
>
> How urgent is it? -- I could try and see if the server explodes if I
> increase the 5 to a 7. That way, you can keep playing there.
>
I'll try with 5 first! The reason I did not notice is that you don't get
to choose if you hit "search for distribution" when looking at an entry in
the st
>
> E.g., it should know domain and codomain, and it should know
> what category it belongs to. I think it makes sense to let a morphism
> know whether it is injective or surjective. However, additional
> information that is certainly interesting to researchers (e.g.: "Was first
> defined by J
OK, great, thanks for clarifying!
Am Mittwoch, 28. Mai 2014 20:53:36 UTC+2 schrieb Simon King:
>
> Hi Martin,
>
> On 2014-05-28, 'Martin R' via sage-combinat-devel <
> sage-comb...@googlegroups.com > wrote:
> >> E.g., it should know domain and codomain, a
Hi there!
I just opened a ticket with a first version of an interface to the FindStat
database at http://trac.sagemath.org/ticket/17818. Many thanks go to
Viviane Pons, Travis Scrimshaw and Christian Stump!
Comments and feature requests very welcome!
Martin
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I just uploaded a redesign of the findstat interface, taking into account
the criticism as well as I could.
Comments and feature requests very welcome!
Martin
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I have begun to fix the documentation of the interface, and I think it's
ALMOST ready to review. I really need help now on the following two items:
4) a design question: it appears that, in sage, python properties are
hardly used at all. I have no idea why. Currently, the interface uses
proper
Dear all,
the ticket now needs review...
Comments and feature requests are still very welcome!
Best,
Martin
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Upon request, I included a guided tour to the interface. Thus, now it's a
great time to explore (and review :-)!
Martin
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Is there anything I can do to get this reviewed?
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To post
I'm surprised that map_coefficients insists on producing an element of the
same parent. Why is this reasonable?
Martin
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> .map_coefficients doesn't produce an element of the same parent in this
case (here it is returning a malformed Sage object). In this example it is
sending a symmetric function with coefficients in the ring QQ to a
symmetric function with coefficients that are factor objects. It however
is n
I opened a ticket: http://trac.sagemath.org/ticket/18264
Martin
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I just pushed an initial try. If you care, could you have a look whether
it's in principle OK?
Thanks,
Martin
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Wow, it's incredible what you achieved here! And I remember, it seemed to
be hard work! Congratulations!
Martin
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Hi there!
At https://trac.sagemath.org/ticket/21594 I have finally polished my
personal growth diagrams code. Comments and patches are very welcome.
In particular:
* implement backward rules for domino insertion
* implement semistandard domino insertion
* implement Young-Fibonacci insertion
In https://trac.sagemath.org/ticket/21594 there is a implementation of
Fomin's growth diagrams for dual graded graphs in quite some generality.
For illustration, I implemented RSK and its variants, Domino insertion,
the Binary Word growth, the Sylvester graph, Young Fibonacci.
I took some care
See also https://trac.sagemath.org/ticket/25173
(please ping if I the code is of interest)
Martin
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