#13203: Promotion on Tableaux should force its argument to be an Integer.
---------------------------------+------------------------------------------
Reporter: nthiery | Owner: sage-combinat
Type: PLEASE CHANGE | Status: new
Priority: major | Milestone: sage-5.2
Component: combinatorics | Keywords: tableaux, promotion
Work issues: | Report Upstream: N/A
Reviewers: Nicolas M. Thiéry | Authors: Anne Schilling
Merged in: | Dependencies:
Stopgaps: |
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The entries of a tableau are Integers::
{{{
sage: T = Tableau([[1]])
sage: type(T[0][0])
<type 'sage.rings.integer.Integer'>
}}}
This invariant should be preserved by inverse promotion::
{{{
sage: type(T.promotion_inverse(2)[0][0])
<type 'sage.rings.integer.Integer'>
}}}
But this is currently not if the input is a plain int::
{{{
sage: type(T.promotion_inverse(int(2))[0][0])
<type 'int'>
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13203>
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