#19946: Asymptotic Ring: cannot construct 2^n when coefficient ring is SR
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Reporter: cheuberg | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.1
Component: asymptotic expansions | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by dkrenn):
Replying to [ticket:19946 cheuberg]:
> The only work-around I found until now is
> {{{
> sage: A(AsymptoticRing(growth_group='QQ^n', coefficient_ring=ZZ)('2^n'))
> 2^n
> }}}
The workaround
{{{
sage: n.rpow(2)
2^n
}}}
works. However, for some reason (I still have to track this down) the
parent changes to
{{{
sage: n.rpow(1/2).parent()
Asymptotic Ring <QQ^n * n^SR> over Symbolic Ring
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/19946#comment:2>
Sage <http://www.sagemath.org>
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