Opened 10 years ago
Last modified 7 years ago
#11655 new defect
Maxima missing rectform simplification after integral()
Reported by: | jan | Owned by: | burcin |
---|---|---|---|
Priority: | major | Milestone: | sage-6.4 |
Component: | symbolics | Keywords: | |
Cc: | kcrisman | Merged in: | |
Authors: | Reviewers: | ||
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description
var('a b c x', domain='real') A = (sin(a) * x^2+sin(b) *x + sin(c)) * exp(-x^2) Aint = A.integrate(x,-infinity,infinity)
A.imag() is 0
Aint.imag() is a long expression, which doesn't simplify to 0. This surprising for the user.
A slightly different example, actually a generalization of the one above, just works:
var('a b c x', domain='real') B = (a * x^2+b *x + c) * exp(-x^2) Bint = B.integrate(x,-infinity,infinity)
Examples can be found here: http://demo.sagenb.org/home/pub/179
Change History (6)
comment:1 Changed 10 years ago by
- Cc kcrisman added
comment:2 Changed 8 years ago by
- Milestone changed from sage-5.11 to sage-5.12
comment:3 Changed 8 years ago by
- Milestone changed from sage-6.1 to sage-6.2
comment:4 Changed 7 years ago by
- Milestone changed from sage-6.2 to sage-6.3
comment:5 Changed 7 years ago by
- Milestone changed from sage-6.3 to sage-6.4
comment:6 Changed 7 years ago by
- Summary changed from A.integrate() has imaginary part for real A to Maxima missing rectform simplification after integral()
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This seems to be a missing rectform simplification because
The bug is then rather that Maxima does it not in all cases.