#15327: More minor tableau and skew_tableau optimizations, and moving out
attacking_pairs
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Reporter: darij | Owner:
Type: enhancement | Status:
Priority: major | needs_review
Component: combinatorics | Milestone: sage-5.13
Keywords: sage-combinat, tableau, | Resolution:
partition, skew tableau | Merged in:
Authors: Darij Grinberg | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: #15269 | Stopgaps:
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Description changed by darij:
Old description:
> This patch brings some little speedups on tableaux and skew tableaux, in
> particular copying over the #15269 fixes to `skew_tableau.py`. It also
> modifies the semantics of the `to_chain` function so as to allow an
> optional `max_entry` parameter (which makes it return a chain of a given
> length -- useful if one is considering semistandard tableaux with ceiling
> higher than the highest entry). Furthermore it moves the
> `attacking_pairs` method from `tableau.py` to `partition.py`, and
> deprecates it in `tableau.py`. In the only place where this method is
> used, it is factored in for speed reasons.
>
> Patch to come in 20 minutes.
New description:
This patch brings some little speedups on tableaux and skew tableaux, in
particular copying over the #15269 fixes to `skew_tableau.py`. It also
modifies the semantics of the `to_chain` function so as to allow an
optional `max_entry` parameter (which makes it return a chain of a given
length -- useful if one is considering semistandard tableaux with ceiling
higher than the highest entry). Furthermore it moves the `attacking_pairs`
method from `tableau.py` to `partition.py`, and deprecates it in
`tableau.py`. In the only place where this method is used, it is factored
in for speed reasons.
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Ticket URL: <http://trac.sagemath.org/ticket/15327#comment:4>
Sage <http://www.sagemath.org>
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