From: brabuhr@...
Date: 2010-06-08T04:52:24+09:00
Subject: Re: Complex numbers contradiction?

On Mon, Jun 7, 2010 at 3:33 PM, Robert Dober <robert.dober@gmail.com> wrote:
>> This looks correct:
>>>> Complex(1,1)**-1
>> => Complex(Rational(1, 2), Rational(-1, 2))
>>
>> But this does not; should be same answer:
>>>> 1/Complex(1,1)
>> => Complex(0, -1)
>>
> Correct on my box
> ruby-1.9.1-p378 > 1/Complex(1,1)
>  => 12-12i
>
> which version do you have?

ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]
Complex(0, -1)

jruby 1.5.0 (ruby 1.8.7 patchlevel 249) (2010-05-12 6769999) (OpenJDK
Client VM 1.6.0_18) [i386-java]
Complex(0, -1)

jruby 1.5.0 (ruby 1.9.2dev trunk 24787) (2010-05-12 6769999) (OpenJDK
Client VM 1.6.0_18) [i386-java]
lib/complex.rb is deprecated
((1/2)-(1/2)*i)

rubinius 1.0.0 (1.8.7 release 2010-05-14 JI) [i686-pc-linux-gnu]
Complex(0, -1)

ruby 1.9.2dev (2009-07-18 trunk 24186) [i686-linux]
((1/2)-(1/2)*i)