#18092: evaluating symbolic expressions (without conversion to SR, i.e.,
staying in
ring of values)
-------------------------+-------------------------------------------------
Reporter: | Owner:
dkrenn | Status: needs_info
Type: | Milestone: sage-6.6
enhancement | Resolution:
Priority: major | Merged in:
Component: | Reviewers:
symbolics | Work issues:
Keywords: sd66 | Commit:
Authors: | 276f0f3d3583c66c7e137350c578e8588c9b236d
Daniel Krenn | Stopgaps:
Report Upstream: N/A |
Branch: |
u/dkrenn/SR/eval |
Dependencies: |
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Comment (by rws):
As to the original `subs` error, nbruin has explained why there is no
general solution, a workaround for polynomials would be
{{{
sage: P.<p> = ZZ[[]]
sage: x.power_series(ZZ)
x + O(x^2)
sage: P(_)
p + O(p^2)
}}}
I believe a more general way to have all possibilities of both `SR` and
the series rings is to fix conversions between them, and use a series ring
over `SR`. This depends on #17659, please review.
--
Ticket URL: <http://trac.sagemath.org/ticket/18092#comment:30>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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