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use Maxima's trigrat() in symbolic simplify #17065
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comment:2
Please review. New commits:
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Author: Ralf Stephan |
Commit: |
comment:3
Quite some doctest failures on the buildbot. Some of them are probably not due this particular change, but others most probably are. A few are simply better answers now (that's just a matter of changing the expected output), but there are also some that are much worse. So the change is not uniformly an improvement. ratsimp claims "canonical form", so that's definitely attractive. However, do we know if its rewrites always apply across the whole domain? We'd have to document if it deviates. |
comment:4
Since setting "needs_work" makes the buildbot link disappear, and I'm too stupid to find the results otherwise (I tried), I cannot sort this out without help, sorry. |
comment:5
This can even lead to disaster, I think:
I really am not interested in seeing |
comment:6
Replying to @rwst:
Oh, that's silly. I'm setting it back to "needs review" to make the report visible for now. Hopefully we can have this fixed. |
comment:7
Thanks, the link is now here: http://build.sagedev.org/trac/builders/trac_builder/builds/1046 |
comment:8
Replying to @kcrisman:
While this one could be resolved by adding a
I cannot see how to fix the doctest failure:
the minimal case being
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comment:9
On the other hand, replacing
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comment:10
Replying to @rwst:
Yes, I noticed that one too. I have confirmed that the same problem arises in Maxima 5.34.1 on SBCL, so it's probably a maxima problem. This is now: |
Upstream: Fixed upstream, but not in a stable release. |
comment:12
While some of the mentioned problems have been fixed in recent Maxima, this no longer works:
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The ask page
http://ask.sagemath.org/question/11365/simplify-trigonometric-expression/
showed that trigrat() is not used. What a waste.
Upstream: Fixed upstream, but not in a stable release.
Component: symbolics
Keywords: maxima, simplification, trigonometric
Author: Ralf Stephan
Branch/Commit: u/rws/use_maxima_s_trigrat___in_symbolic_simplify @
3db6f89
Issue created by migration from https://trac.sagemath.org/ticket/17065
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