#4142: limit bug: should be -Infinity, but gives +Infinity
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Reporter: ddrake | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone: sage-3.1.3
Component: calculus | Keywords:
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As discussed in http://groups.google.com/group/sage-
devel/browse_thread/thread/7afc9f414413906 , some limits are not evaluated
correctly:
{{{
sage: f = sqrt(1-x^2)
sage: g = diff(f, x); g
-x/sqrt(1 - x^2)
sage: limit(g, x=1, dir='below')
+Infinity
}}}
The last command should give -Infinity, of course, since `f` is a
semicircle. At the other endpoint, the limit is correct (+Infinity).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4142>
SAGE <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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