#16352: TransitiveIdeal -> RecursivelyEnumeratedSet in the sage library
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Reporter: slabbe | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.4
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Description changed by slabbe:
Old description:
> `TransitiveIdeal` and `TransitiveIealGraded` are used in the code of
> `sage/combinat`, `sage/categories` and `sage/groups` at least. These
> should be replaced by `RecursivelyEnumeratedSet` for speed improvements
> and also to avoid issues explained in #6637.
>
> This is a follow up of #6637 where `TransitiveIdeal` and
> `TransitiveIealGraded` have been deprecated.
New description:
`TransitiveIdeal` and `TransitiveIealGraded` are used in the code of
`sage/combinat`, `sage/categories` and `sage/groups` at least. These
should be replaced by `RecursivelyEnumeratedSet` for speed improvements
and also to avoid issues explained in #6637.
This is a follow up of #6637 where `TransitiveIdeal` and
`TransitiveIealGraded` have been deprecated.
More precisely, occurences of
`TransitiveIdeal(succ, seeds)`
are replaced by:
`RecursivelyEnumeratedSet(seeds, succ, structure=None,
enumeration='naive')`
and occurences of
`TransitiveIdealGraded(succ, seeds, max_depth)`
are replaced by:
`RecursivelyEnumeratedSet(seeds, succ, structure=None,
enumeration='breadth', max_depth=max_depth)`
Indeed, old transitive ideal *graded* was not using the hypothesis of
being graded in the code. This is why the structure is set to `None` now.
Of course, if people have *really* a graded structure, then the structure
should be set to `'graded'`... For now, I am keeping the behavior like it
was before to avoid problems.
--
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Ticket URL: <http://trac.sagemath.org/ticket/16352#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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