#12968: round of symbolic expression (precision issue due to RR)
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Reporter: dkrenn | Owner:
burcin
Type: defect | Status:
needs_review
Priority: major | Milestone:
sage-5.1
Component: symbolics | Resolution:
Keywords: round symbolic precision RR beginner | Work issues:
Report Upstream: N/A | Reviewers:
Burcin Erocal
Authors: Mike Hansen | Merged in:
Dependencies: | Stopgaps:
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Comment (by mhansen):
Replying to [comment:6 burcin]:
> Just by reading the code, I have one minor problem: Isn't the test `self
> 0` too costly if the expression still contains variables? Maybe we
should convert to `RR` first and do the comparison there
Maybe you could try converting to RIF first instead and then do the full
test if that interval contains zero. Checking to see if there are
variables should also be really quick. I'll put up a patch that does
this.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12968#comment:7>
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