#14162: fix parent coefficients for elements of NCSF / QSym
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Reporter: saliola | Owner: sage-combinat
Type: defect | Status: positive_review
Priority: major | Milestone: sage-5.8
Component: combinatorics | Resolution:
Keywords: qsym, ncsf | Work issues:
Report Upstream: N/A | Reviewers: Mike Zabrocki
Authors: Franco Saliola | Merged in:
Dependencies: | Stopgaps:
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Comment (by nthiery):
Ouch! 1/-1 is indeed a rational number! There are probably other
occurrences of this elsewhere in the code. We probably should have
some mantra for -1^n in a given ring.
In the mean time thanks for catching and fixing this! It's probably
even slightly faster than before since the arithmetic is done with
plain ints.
Cheers,
Nicolas
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14162#comment:3>
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