#10930: specializations for symmetric functions
-----------------------------+----------------------------------------------
Reporter: mantepse | Owner: mantepse
Type: enhancement | Status: new
Priority: minor | Milestone: sage-4.7
Component: combinatorics | Keywords: principal specialization,
exponential specialization, symmetric functions
Author: Martin Rubey | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Description changed by mantepse:
Old description:
> This patch implements the principal and exponential specialisations for
> symmetric functions as given in Stanley, Enumerative Combinatorics,
> Section 7.8.
>
> Unfortunately, the patch currently has several problems:
> 1) it seems that always the default code in sf/sfa.py is called, I don't
> know why
> 2) I do not know how to give the desired default argument 1 the correct
> type in exponential_specialization
> 3) I guess one should rather implement this for quasi-symmetric
> functions, but I do not know enough about these currently
> 4) the documentation and sensible tests are still missing
New description:
This patch -- in the combinat queue:
http://combinat.sagemath.org/hgwebdir.cgi/patches/file/tip
/sf_principal_specialization-mr.patch
implements the principal and exponential specialisations for symmetric
functions as given in Stanley, Enumerative Combinatorics, Section 7.8.
Unfortunately, the patch currently has several problems:
1) it seems that always the default code in sf/sfa.py is called, I don't
know why
2) I do not know how to give the desired default argument 1 the correct
type in exponential_specialization
3) I guess one should rather implement this for quasi-symmetric functions,
but I do not know enough about these currently
4) the documentation and sensible tests are still missing
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10930#comment:3>
Sage <http://www.sagemath.org>
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