#7983: Notion of descent/major index in tableau.py is not mathematically
standard
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Reporter: jbandlow | Owner: sage-combinat
Type: defect | Status: needs_review
Priority: major | Milestone:
Component: combinatorics | Resolution:
Keywords: combinat, tableaux | Work issues:
Report Upstream: N/A | Reviewers: jbandlow
Authors: arattan, Darij Grinberg | Merged in:
Dependencies: #8392 | Stopgaps:
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Comment (by darij):
Hi Travis,
thanks for looking into this! I've updated the reference; is it correct
now?
As for {{{up}}}, is it possible that you meant {{{standard_descents}}}
instead? I can't imagine how {{{up}}} and {{{down}}} would be used for
anything other than standard tableaux; is it really useful to have a
function to tell how many ways there are to add a square to a non-standard
tableau to get a standard one? On the other hand, descents could indeed
survive a generalization, though I don't know which choices are preferred
here.
Best regards,
Darij
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7983#comment:10>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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