Open edd8e884-f507-429a-b577-5d554626c0fe opened 4 years ago
Upstream: Reported upstream. No feedback yet.
I found this commit message in the Maxima Git log; the first integral mentioned is exactly the regression in Sage.
commit 47a6afd1d4691b83bedd197dea322dfd64f4f0f9
Author: Dan Gildea <dgildea>
Date: Fri Dec 28 15:50:26 2018 -0500
add series expansion for expintegral_si and gamma_incomplete
remove fallback to unevaluated derivative - this was a mistake
unfortunately 3 integrals from the test suite now fail, due
to the singularity at li[2](1):
integrate(log(cot(x) - 1), x, 0, %pi/4); /* rtest16 524 */
integrate(log(cos(x)), x, 0, %pi/2); /* rtest16 525 */
integrate((log((2-x)/2)+log(2))/(1-x), x, 0, 1); /* rtestint 232 */
marked as expected failures.
Fixes #3484
Similar bug (numerical integral of sin(x)/x
is off by π): #11164
Changed upstream from Reported upstream. No feedback yet. to Reported upstream. Developers acknowledge bug.
Description changed:
---
+++
@@ -7,6 +7,8 @@
Whose numerical value is `2.467401100272339*I+0.2721982612879502` while it should be `0.2721982612879502`.
+This integral had previously been wrong for a different reason and had been fixed upstream in [https://sourceforge.net/p/maxima/bugs/2501/](https://sourceforge.net/p/maxima/bugs/2501/); the doctest was added in #13733.
+
The bug is doctested and marked as `# known bug` in `src/sage/symbolic/integration/integral.py` (once #30063 is merged).
The bug is reported upstream as https://sourceforge.net/p/maxima/bugs/3649/
Changed keywords from none to integral, maxima
Moving to 9.4, as 9.3 has been released.
Upgrading Maxima to 5.44.0 (see #30063) leads to the following regression:
Whose numerical value is
2.467401100272339*I+0.2721982612879502
while it should be0.2721982612879502
.This integral had previously been wrong for a different reason and had been fixed upstream in https://sourceforge.net/p/maxima/bugs/2501/; the doctest was added in #13733.
The bug is doctested and marked as
# known bug
insrc/sage/symbolic/integration/integral.py
(once #30063 is merged).The bug is reported upstream as https://sourceforge.net/p/maxima/bugs/3649/
Upstream: Reported upstream. Developers acknowledge bug.
CC: @kiwifb
Component: symbolics
Keywords: integral, maxima
Issue created by migration from https://trac.sagemath.org/ticket/30389