#19993: Arb: parse symbolic expressions
---------------------------+-------------------------------------
Reporter: cheuberg | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-7.1
Component: numerical | Keywords: arb
Merged in: | Authors: Clemens Heuberger
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
---------------------------+-------------------------------------
Current behaviour:
{{{
sage: RBF(zeta(3))
[1.202056903159590 +/- 5.38e-16]
sage: RBF(2*zeta(3))
Traceback (most recent call last):
...
TypeError: unable to convert 2*zeta(3) to a RealBall
}}}
That is unfortunate (imagine that this is part of a large symbolic
expression, involving various constants, logarithms etc.)
I assume that the first call succeeds because `RIF` can handle it.
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Ticket URL: <http://trac.sagemath.org/ticket/19993>
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