#9953: int(symbolic expr) off by 1
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Reporter: schilly | Owner: burcin
Type: defect | Status: needs_work
Priority: critical | Milestone: sage-4.6.2
Component: symbolics | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by dsm):
The current patch won't work for 0 or negative numbers (the log2 breaks).
This can be easily fixed, but dealing with cases like
{{{
sage: f = 1-1/10**100
sage: int(f)
0
sage: int(SR(f))
1
}}}
where the precision needed to get the right result isn't a function of the
size is a little trickier. Maybe fast-path the common cases and then fall
back on the existing floor/ceil logic?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9953#comment:3>
Sage <http://www.sagemath.org>
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