Opened 5 years ago
Last modified 12 months ago
#11493 new defect
two different results with same numeric integral
Reported by: | kcrisman | Owned by: | burcin |
---|---|---|---|
Priority: | major | Milestone: | sage-6.4 |
Component: | calculus | Keywords: | |
Cc: | mjo | Merged in: | |
Authors: | Reviewers: | ||
Report Upstream: | Reported upstream. No feedback yet. | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: | #12732 |
Description (last modified by kcrisman)
Reported by Nicolas Privault via Rado Kirov:
sage: integrate(x^(0.5)*e^(-x-x^2),x,0,infinity).n() 0.886226925452758 sage: integrate(x^(1/2)*e^(-x-x^2),x,0,infinity).n() 0.32015709036013135 which give two different results, and the second one is correct.
Change History (13)
comment:1 Changed 5 years ago by kcrisman
comment:2 Changed 5 years ago by kcrisman
- Description modified (diff)
The other thing was correct, I believe, so I'm not sure what the poster thought was wrong with it.
sage: numerical_integral(x^(0.5)*e^(-x),0,100000) (0.88622692749267307, 4.3485198683228606e-07)
comment:3 Changed 5 years ago by kcrisman
- Report Upstream changed from N/A to Reported upstream. Little or no feedback.
This is now reported at this Maxima ticket.
comment:4 Changed 4 years ago by roed
- Stopgaps set to #12732
comment:5 Changed 4 years ago by mjo
- Cc mjo added
comment:6 Changed 4 years ago by roed
- Report Upstream changed from Reported upstream. Little or no feedback. to Reported upstream. No feedback yet.
comment:7 Changed 3 years ago by kcrisman
#13718 may be related.
comment:8 Changed 2 years ago by jdemeyer
- Milestone changed from sage-5.11 to sage-5.12
comment:9 Changed 2 years ago by vbraun_spam
- Milestone changed from sage-6.1 to sage-6.2
comment:10 Changed 2 years ago by chapoton
Still not working in 6.2.beta3. Moreover one also gets
sage: integrate(e^(-x-x^2+log(x)/2),x,0,infinity) integrate(e^(-x^2 - x + 1/2*log(x)), x, 0, +Infinity) sage: integrate(e^(-x-x^2+log(x)/RDF(2)),x,0,infinity) ____ \/ pi ------ 2
comment:11 Changed 21 months ago by vbraun_spam
- Milestone changed from sage-6.2 to sage-6.3
comment:12 Changed 18 months ago by vbraun_spam
- Milestone changed from sage-6.3 to sage-6.4
comment:13 Changed 12 months ago by rws
- Summary changed from Wrong integral computation to two different results with same numeric integral
Not working in 6.5rc0.
Note: See
TracTickets for help on using
tickets.
Here is what is going on.