#5781: [with patch, need review] The empty standard tableau exists ! :-)
---------------------------+------------------------------------------------
Reporter: hivert | Owner: hivert
Type: defect | Status: new
Priority: major | Milestone: sage-3.4.1
Component: combinatorics | Keywords: tableau
---------------------------+------------------------------------------------
Before my patch:
{{{
sage: [] in StandardTableaux()
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
/home/averell/.sage/temp/tomahawk/19026/_home_averell__sage_init_sage_0.py
in <module>()
/usr/local/sage/sage/local/lib/python2.5/site-
packages/sage/combinat/tableau.pyc in __contains__(self, x)
1740 fillings += row
1741 fillings.sort()
-> 1742 if fillings != range(1, max(fillings)+1):
1743 return False
1744
ValueError: max() arg is an empty sequence
}}}
Now:
{{{
sage: [] in StandardTableaux()
True
}}}
Florent, the specialist of the empty objects !!!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5781>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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