#19568: arb balls should have the precision of the parent
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Reporter: jdemeyer | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.10
Component: interfaces | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jdemeyer/arb_balls_should_have_the_precision_of_the_parent|
638f7f581a72056c39d013e4b46cce500176a710
Dependencies: #19152 | Stopgaps:
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Comment (by cheuberg):
Replying to [comment:4 jdemeyer]:
> There is a good reason, read the ticket description.
Equality of balls is rare, it only holds if either the objects are
identical (`is` is a subset of `==`) or if both balls are exact and equal.
As `RBF(1.3)` is not exact, it should not be surprising that `a+0 == b+0`
returns `True`.
A similar example --- and this is not related to the purpose of the ticket
as far as I can understand it --- is
{{{
sage: a = RBF(1.3)
sage: a == a
True
sage: a + 1 == a + 1
False
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/19568#comment:6>
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