#8438: Construction of a skew partition from its row and column lengths
------------------------------+---------------------------------------------
Reporter: hivert | Owner: hivert
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.3.4
Component: combinatorics | Keywords: skew partitions
Author: Florent Hivert | Upstream: N/A
Reviewer: Nicolas Borie | Merged:
Work_issues: |
------------------------------+---------------------------------------------
Changes (by hivert):
* reviewer: => Nicolas Borie
Comment:
Replying to [comment:2 nborie]:
> Can you improve that :
>
{{{
sage: S = SkewPartition(([1,1,1,1,1,1],[1,1,1,1,1,1]))
sage: S.column_lengths()
[0]
sage: S.row_lengths()
[0, 0, 0, 0, 0, 0]
sage: from_row_and_column_length([0,0,0,0,0,0],[0])
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
...
...
ValueError: invalid skew partition
}}}
The cases with 0 row and columns length are ambiguous (see the example in
the doc). I now raise a proper error:
{{{
sage: sage: from_row_and_column_length([0,0,0,0,0,0],[0])
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
...
ValueError: row and column length must be positive
}}}
I re-uploaded the new patch ! Please review.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8438#comment:4>
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