#12967: bugs in comparisons between constants, wrapped pyobjects, infinity
-------------------------------------+-------------------------------------
Reporter: dkrenn | Owner: burcin
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.6
Component: symbolics | Resolution:
Keywords: compare pi | Merged in:
infinity bool | Reviewers: Karl-Dieter Crisman
Authors: Travis Scrimshaw, | Work issues:
Ralf Stephan | Commit:
Report Upstream: N/A | c5845f6b18d582807dafaaf60ad6a5c8017173f3
Branch: u/rws/12967-2 | Stopgaps:
Dependencies: #17984 |
-------------------------------------+-------------------------------------
Comment (by rws):
Given that it would be more consistent (but less user-friendly) to not mix
**R** with `RR`, and `item.is_real()` is buggy, the fix of that is
critical (#16436, #17117 are aspects). The `Parent.__contains__` method
would have to be adapted and a warning added. Maybe this even leads to a
more consistent `Parent.__contains__`. The fix of the behaviour of
`bool(item==P(item))` is then less urgent (because it's rarely used
otherwise). As to this ticket where failing comparisons with `oo` are
described, the code does fix these but leaves at least the `pi in RIF`
doctest failing (explanation in comment:33), and possibly more if I remove
the `RR/CC.__contains__`. This could benefit from a more consistent
`Parent.__contains__` so let's go on.
--
Ticket URL: <http://trac.sagemath.org/ticket/12967#comment:56>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
