#9480: Sage mixes Infinity and +Infinity
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Reporter: zimmerma | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone:
Component: calculus | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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This is related to #8942. The limit function can output either
{{{+Infinity}}}, {{{-Infinity}}}, or {{{Infinity}}}, the later
meaning a complex infinity. For example:
{{{
sage: limit(1/x, x=0, dir='above')
+Infinity
sage: limit(1/x, x=0, dir='below')
-Infinity
sage: limit(1/x, x=0)
Infinity
}}}
However Sage does not distinguish {{{+Infinity}}} and {{{Infinity}}}:
{{{
sage: l1=limit(1/x, x=0, dir='above')
sage: l2=limit(1/x, x=0, dir='below')
sage: l3=limit(1/x, x=0)
sage: l1==l3
True
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9480>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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