Ticket #1891 (assigned bug)
Problems with acosh, asech, atanh and acoth in Complex PMC
Reported by: | fbrito | Owned by: | Util |
---|---|---|---|
Priority: | normal | Milestone: | 2.11 |
Component: | core | Version: | 2.10.0 |
Severity: | medium | Keywords: | complex math trig |
Cc: | Language: | ||
Patch status: | Platform: | all |
Description
Hello,
While doing this GCI task I had some problems with "acosh".
Here is the output of tests that I wrote:
not ok 529 - acosh of 0-1i # Have: -0.881374+1.570796i # Want: 0.881374-1.570796i not ok 530 - acosh of 0-0.5i # Have: -0.481212+1.570796i # Want: 0.481212-1.570796i not ok 535 - acosh of 2-3i # Have: -1.983387+1.000144i # Want: 1.983387-1.000144i not ok 537 - acosh of -2-3i # Have: -1.983387+2.141449i # Want: 1.983387-2.141449i
The "want" values were taken from WolframAlpha (ex http://www.wolframalpha.com/input/?i=acosh(2-3i)).
Some other methods that relies on "acosh" are also returning a wrong value, like "asech".
not ok 587 - asech of 0.5+0i # Have: -1.316958+0.000000i # Want: 1.316958+0.000000i not ok 593 - asech of 0+0.5i # Have: -1.443635+1.570796i # Want: 1.443635-1.570796i not ok 594 - asech of 0+1i # Have: -0.881374+1.570796i # Want: 0.881374-1.570796i not ok 595 - asech of 0+2i # Have: -0.481212+1.570796i # Want: 0.481212-1.570796i not ok 596 - asech of 2+3i # Have: -0.231335+1.420411i # Want: 0.231335-1.420411i not ok 598 - asech of -2+3i # Have: -0.231335+1.721182i # Want: 0.231335-1.721182i
I also found some errors in "atanh" and "acoth":
not ok 538 - atanh of -2+0i # Have: -0.549306-1.570796i # Want: -0.549306+1.570796i not ok 554 - acoth of -0.5+0i # Have: -0.549306-1.570796i # Want: -0.549306+1.570796i
The tests that I wrote can be found here: https://github.com/fernandobrito/parrot/commits/gci_tests
Environment: Ubuntu 10.10, Parrot 2.10.1 (master branch), Perl 5.10.1 i686-linux-gnu-thread-multi, cc (gcc 4.4), i386, linux
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