id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	lang	patch	platform
1891	Problems with acosh, asech, atanh and acoth  in Complex PMC	fbrito	Util	"Hello,

While doing [http://www.google-melange.com/gci/task/show/google/gci2010/parrot_perl_foundations/t129193205977 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"	bug	assigned	normal	2.11	core	2.10.0	medium		complex math trig				all