#16606: Bernstein creation operators and other fixes on symmetric functions
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Reporter: darij | Owner:
Type: defect | Status: needs_info
Priority: major | Milestone: sage-6.3
Component: combinatorics | Resolution:
Keywords: symmetric | Merged in:
functions, sage-combinat | Reviewers:
Authors: Darij Grinberg | Work issues:
Report Upstream: N/A | Commit:
Branch: public/combinat | 494cc5ce34c44c60d1691486fb1663a247ce44f2
/witt-sf-fix | Stopgaps:
Dependencies: |
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Comment (by darij):
Thanks, but this begs my question, which I guess was unclear.
The thing that can fail is not the "change_ring"; it's the inversion
itself. And what I am worried is that it could fail despite the matrix
(which is actually an integer matrix with determinant -+1) having an
inverse. The one realistic workaround for that is to do these matrix
computations over the base ring ZZ rather than the given base ring for the
symmetric functions. This could have the additional advantage that the
matrices are constructed only once even if I work over different rings at
the same time. Is it worth redesigning the Witt basis?
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Ticket URL: <http://trac.sagemath.org/ticket/16606#comment:11>
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