#12967: comparison of pi and infinity wrong
--------------------------------------------+-------------------------------
Reporter: dkrenn | Owner: burcin
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.6
Component: symbolics | Resolution:
Keywords: compare pi infinity bool | Work issues:
Report Upstream: N/A | Reviewers: Karl-Dieter
Crisman
Authors: Travis Scrimshaw | Merged in:
Dependencies: | Stopgaps:
--------------------------------------------+-------------------------------
Changes (by kcrisman):
* reviewer: => Karl-Dieter Crisman
Old description:
> We have
> {{{
> sage: bool(pi<Infinity)
> False
> sage: bool(pi>Infinity)
> True
> }}}
> which is obviously wrong. It seems that the problem only occurs with
> {{{pi}}}, because the following give correct results
> {{{
> sage: bool(pi<2*pi)
> True
> sage: bool(2*pi<Infinity)
> True
> sage: bool(e<Infinity)
> True
> sage: bool(e<pi)
> True
> }}}
>
> This was reported on [https://groups.google.com/d/topic/sage-
> support/2GlgJKOfK3g/discussion sage-support] by Robert Samal.
New description:
We have
{{{
sage: bool(pi<Infinity)
False
sage: bool(pi>Infinity)
True
}}}
which is obviously wrong. It seems that the problem only occurs with
{{{pi}}}, because the following give correct results
{{{
sage: bool(pi<2*pi)
True
sage: bool(2*pi<Infinity)
True
sage: bool(e<Infinity)
True
sage: bool(e<pi)
True
}}}
This was reported on [https://groups.google.com/d/topic/sage-
support/2GlgJKOfK3g/discussion sage-support] by Robert Samal.
'''Apply''' [attachment:trac_12967-symbolic_ring-review.patch].
--
Comment:
Patchbot, apply trac_12967-symbolic_ring-review.patch
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12967#comment:7>
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