#16769: Conversion RR -> QQ wrong for exact integers
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Reporter: jdemeyer | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.3
Component: basic arithmetic | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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This real number can be exactly represented by the integer (and also
rational) `2^54`, so this is off by one:
{{{
sage: QQ(RR(2^54))
18014398509481983
}}}
The underlying function called by `QQ()` is `simplest_rational`:
{{{
sage: RR(2^54).simplest_rational()
18014398509481983
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/16769>
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