#12967: bugs in comparisons between constants, wrapped pyobjects, infinity
-------------------------------------------------+-------------------------
Reporter: dkrenn | Owner: burcin
Type: defect | Status:
Priority: major | needs_work
Component: symbolics | Milestone: sage-6.8
Keywords: compare pi infinity bool | Resolution:
Authors: Travis Scrimshaw, Ralf | Merged in:
Stephan | Reviewers: Karl-
Report Upstream: Reported upstream. Developers | Dieter Crisman
acknowledge bug. | Work issues:
Branch: | Commit:
Dependencies: pynac-0.3.9.2 | Stopgaps:
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Changes (by rws):
* commit: c5845f6b18d582807dafaaf60ad6a5c8017173f3 =>
* dependencies: #17984 => pynac-0.3.9.2
* branch: u/rws/12967-2 =>
* milestone: sage-6.6 => sage-6.8
Comment:
Pynac git master has a fix that does this:
{{{
sage: bool(SR(oo) > 5)
True
sage: bool(5 < SR(oo))
True
sage: bool(SR(2)<Infinity)
True
sage: bool(pi<Infinity)
True
sage: bool(pi>Infinity)
False
sage: bool(2*pi<Infinity)
True
sage: bool(SR(pi) < SR(Infinity))
True
sage: bool(sqrt(2)<oo)
True
sage: bool(log(2)<oo)
True
sage: bool(e<oo)
True
sage: bool(e+pi<oo)
True
sage: bool(e^pi<oo)
True
sage: bool(SR(2)<-oo)
False
sage: bool(SR(2)>-oo)
True
sage: bool(exp(2)>-oo)
True
}}}
It uses info flags and evalf where applicable. Some function info flags
were introduced earlier in Pynac.
--
Ticket URL: <http://trac.sagemath.org/ticket/12967#comment:61>
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