#17979: Reimplementation of IntegerListsLex
-------------------------------------+-------------------------------------
Reporter: aschilling | Owner:
Type: defect | Status: needs_review
Priority: blocker | Milestone: sage-6.6
Component: combinatorics | Resolution:
Keywords: days64 | Merged in:
Authors: Bryan Gillespie, | Reviewers: Nathann Cohen, Jeroen
Anne Schilling, Nicolas M. Thiery | Demeyer, Travis Scrimshaw
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/ticket/17979 | e151d78ea32b9cac2047e2faff3247bdcce1f5d5
Dependencies: | Stopgaps:
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Comment (by aschilling):
Regarding Jeroen's comment:395, I think this could possibly be fixed by
adjusting ._floor.limit_start() after the smoothing procedure. Note that
{{{
sage: C=IntegerListsLex(7, floor=[4,0], max_part=4, min_slope=-1)
sage: C.list()
[[4, 3]]
}}}
also works fine. The reason is that
{{{
sage: C._floor.limit_start()
2
}}}
so that
{{{
floor_sum_lower_bound = sum(self._floor(i) for i in
range(self._floor.limit_start()))
}}}
in line 1076 computes a high enough bound that is caught in line 1082.
However, in
{{{
sage: C=IntegerListsLex(7, floor=[4], max_part=4, min_slope=-1)
sage: C._floor.limit_start()
1
}}}
even though
{{{
sage: for i in range(5):
....: print C._floor(i)
....:
4
3
2
1
0
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/17979#comment:402>
Sage <http://www.sagemath.org>
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