Ticket #4142 (closed defect: fixed)
limit bug: should be -Infinity, but gives +Infinity
|Reported by:||ddrake||Owned by:||burcin|
|Report Upstream:||Fixed upstream, in a later stable release.||Reviewers:||Dan Drake|
|Authors:||Karl-Dieter Crisman||Merged in:||sage-4.3.1.alpha0|
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).
- Status changed from new to needs_review
- Report Upstream changed from N/A to Fixed upstream, in a later stable release.
- Authors set to Karl-Dieter Crisman
- Status changed from needs_review to positive_review
- Reviewers set to Dan Drake