#12121: floor/ceil can be very slow at integral values
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Reporter: dsm | Owner: AlexGhitza
Type: defect | Status: needs_review
Priority: major | Milestone: sage-7.1
Component: basic arithmetic | Resolution:
Keywords: | Merged in:
Authors: Vincent Delecroix | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/12121 | 688ebfa077f09ee9a2bc988833ddd4f0fc65a4a1
Dependencies: | Stopgaps:
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Comment (by rws):
Testing equality of symbolics in general undecidable. If you remove all
expressions with variables however, it is easy: convert symbolic constants
and function expressions to float as in `N()`, compare. Of course there
are precision problems but that's nothing in comparison to what yu get
with variables.
The idea to abuse `cmp` is not mine. Somewhere here `RLF(1) <
RLF(sqrt(2))` for example, symbolic `cmp` is called. Should I file a bug
report for such usage?
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Ticket URL: <http://trac.sagemath.org/ticket/12121#comment:28>
Sage <http://www.sagemath.org>
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