Opened 3 years ago
Last modified 4 months ago
#28750 new defect
another maxima integration bug
Reported by: | Frédéric Chapoton | Owned by: | |
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Priority: | major | Milestone: | sage-9.8 |
Component: | calculus | Keywords: | integrate, maxima |
Cc: | Nasser, Karl-Dieter Crisman, Samuel Lelièvre, Dave Morris | Merged in: | |
Authors: | Reviewers: | ||
Report Upstream: | Reported upstream. No feedback yet. | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description (last modified by )
Change History (14)
comment:1 Changed 3 years ago by
Milestone: | sage-9.0 → sage-9.1 |
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comment:2 Changed 3 years ago by
Milestone: | sage-9.1 → sage-9.2 |
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Moving tickets to milestone sage-9.2 based on a review of last modification date, branch status, and severity.
comment:3 Changed 2 years ago by
Milestone: | sage-9.2 → sage-9.3 |
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comment:4 Changed 21 months ago by
Milestone: | sage-9.3 → sage-9.4 |
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Moving to 9.4, as 9.3 has been released.
comment:5 Changed 20 months ago by
EDIT:
in sage 9.4.b0, numerically :
the derivative of g1 is wrong ; those of g2 and g3 are ok
comment:6 Changed 20 months ago by
Cc: | Matthias Köppe Samuel Lelièvre Dave Morris added |
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Description: | modified (diff) |
comment:7 Changed 20 months ago by
directly in maxima:
maxima: a: sin((x-y)/sqrt(2))*(x-y); sin((x-y)/sqrt(2))*(x-y) maxima: g: integrate(a,y); ((2^(3/2)+2)*sin(y/sqrt(2)-x/sqrt(2))+(((-2^(3/2))-2)*(y/sqrt(2)-x/sqrt(2))+((-sqrt(2))-2)*x)*cos(y/sqrt(2)-x/sqrt(2)))/2+sqrt(2)*x*cos(y/sqrt(2)-x/sqrt(2))
comment:8 Changed 20 months ago by
Cc: | Nasser added |
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comment:9 Changed 20 months ago by
Cc: | Karl-Dieter Crisman added; Matthias Köppe removed |
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This should be reported upstream to maxima. Karl-Dieter, would you please do that ?
For info, the correct answer as given by sympy is
sqrt(2)*(x - y)*cos(-1/2*sqrt(2)*(x - y)) + 2*sin(-1/2*sqrt(2)*(x - y))
comment:10 Changed 20 months ago by
Report Upstream: | N/A → Reported upstream. No feedback yet. |
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comment:11 Changed 17 months ago by
Milestone: | sage-9.4 → sage-9.5 |
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comment:12 Changed 14 months ago by
Milestone: | sage-9.5 → sage-9.6 |
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comment:13 Changed 9 months ago by
Milestone: | sage-9.6 → sage-9.7 |
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comment:14 Changed 4 months ago by
Milestone: | sage-9.7 → sage-9.8 |
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