#16234: Assorted fixes and optimizations in sage-combinat (mostly partitions and
tableaux)
-------------------------------------+-------------------------------------
Reporter: darij | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: combinatorics | Resolution:
Keywords: combinat, | Merged in:
tableaux, partitions, findstat, | Reviewers:
documentation, integer_list, | Work issues:
mutability | Commit:
Authors: Darij Grinberg | 045ada00385e37ac746b7320388d13c2e0d9d5a2
Report Upstream: N/A | Stopgaps:
Branch: public/combinat |
/tableaux-et-al-doc |
Dependencies: |
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Changes (by VivianePons):
* status: needs_review => needs_work
Comment:
Hi Darij, thank you very much for this work!
There is something wrong with the documentation of
`symmetric_group_action_on_values`. I must say that I didn't know this
operation, so I don't know its definition. But from the code, it seems
that your documentation doesn't quite correspond to what is done in the
code. When you write this:
{{{
Then, let `a` be the number of opening
parentheses in the word, and `b` the number of closing
parentheses (notice that all opening parentheses are left of
all closing parentheses). Replace the first `b` parentheses
by the letters `i+1`, and replace the remaining `a` parentheses
by the letters `i`.
}}}
Indeed, the action of `s_1` on `[[1,2]]` should give `[[2,1]]` which is
not a semi-standard tableau... (you obtain the unmatched parenthesizes
`)(`). The code answers `[[1,2]]`, I must say that it is quite obscure
and I don't understand what they're doing. But obviously, the
documentation does not explain it correctly. Do you have the paper
reference where this operation is described?
Apart from that, it seems good to me.
--
Ticket URL: <http://trac.sagemath.org/ticket/16234#comment:10>
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