#17979: Reimplementation of IntegerListsLex
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Reporter: aschilling | Owner:
Type: defect | Status: needs_work
Priority: blocker | Milestone: sage-6.6
Component: combinatorics | Resolution:
Keywords: days64 | Merged in:
Authors: Bryan Gillespie, | Reviewers:
Anne Schilling, Nicolas M. Thiery | Work issues:
Report Upstream: N/A | Commit:
Branch: | 611f5c73f0d5b8af4c150abc1785e5ea305b164d
public/ticket/17979 | Stopgaps:
Dependencies: |
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Comment (by nthiery):
Replying to [comment:155 ncohen]:
> Soooooooooo when you get the list `[2,2,0]` in the output of `.list()`,
it represents "all lists beginning by `2,2,0` whose length is included
between 3 and 4"? This information is not included in the object itself,
it is to be understood by how it was first produced.
>
> This identification of list worries me a bit.
I agree: 15 years ago, from the use cases I had under hand, I though
that this was a neat feature to identify lists up to trailing
zeroes. However this is non trivial to specify properly, and I am now
convinced that this is just a can of worms. We should seriously
consider dropping this feature.
However I believe that this is out of the scope of this ticket,
especially since this would require a change in the specifications,
and cause backward incompatibilities. Up to the fuzziness in this
piece of the specification, it sounds like the code should by now be
correct w.r.t. the current specifications; let's get it done.
Cheers,
Nicolas
--
Ticket URL: <http://trac.sagemath.org/ticket/17979#comment:165>
Sage <http://www.sagemath.org>
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