Opened 6 years ago

Last modified 4 years ago

#16905 new defect

GSL can't handle really long intervals for integration?

Reported by: kcrisman Owned by:
Priority: major Milestone: sage-6.4
Component: calculus Keywords:
Cc: jakobkroeker Merged in:
Authors: Reviewers:
Report Upstream: N/A Work issues:
Branch: Commit:
Dependencies: Stopgaps:

Description 

f1(x)=1/sqrt(x^3+2)
f2(x)=1/sqrt(x^4+2)
sage: numerical_integral(f2,1,10^8)
(0.8815690504421161, 3.309409685784312e-09)
sage: numerical_integral(f2,1,10^9)
(0.8815690594421439, 2.7280605832086615e-08)
sage: numerical_integral(f2,1,10^10)
(0.8815690603426408, 6.194229607849825e-07)
sage: numerical_integral(f2,1,10^11)
(2.3214916598860602e-07, 4.5569931705290324e-07)

See ​here for first report.

Change History (2)

comment:1 Changed 6 years ago by kcrisman

Maxima (the .nintegrate method) seems to have a similar problem).

Version 0, edited 6 years ago by kcrisman (next)

comment:2 Changed 4 years ago by jakobkroeker

  • Cc jakobkroeker added
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