Thanks all for your answers.
Too many words for a single post, so I compiled a few comments and
Complex implementation reflections in this blog entry:
http://smallissimo.blogspot.com/2011/10/about-complex-in-squeak.html

I'm not satisfied with current status because we are mixing two paradigms.
Note that putting Complex outside the image is also an easy solution
for playing with paradigms without causing undesired side effects to
Complex-unaware-Applications.
But maybe it's too easy to divert like this, and we should better
think harder ;)

Nicolas

2011/10/11 Ricardo Moran <richi.moran at gmail.com>:
>
> On Tue, Oct 11, 2011 at 9:51 AM, Juan Vuletich <juan at jvuletich.org> wrote:
>>
>> Juan Vuletich wrote:
>>>
>>> Hi Folks,
>>>
>>> Rodney Polkinghorne wrote:
>>>>
>>>> ...
>>>>
>>>> extra fact:
>>>> - Complex is absent from Cuis
>>>>
>>>
>>> Not for long :) . I have already integrated it and will be in next Cuis
>>> release. I think Complex belongs in the base system.
>>
>> Oh, forgot to say. I also think that
>>   -1 sqrt = 1i
>> should be true, and I'm working on it (together with some other tweaks to
>> #sqrt and friends I'll publish when finished).
>
> +1. I was just about to comment on that one :)
> It always bothered me that "-1 sqrt" wouldn't answer "1i". It seems like an
> incomplete implementation, being that we have the class Complex.
> At the time I "fixed" it by just relying on the fact that the sqrt primitive
> fails when the receiver is negative, but that solution seems very hackish. I
> wonder what your solution looks like? :)
> Cheers,
> Richo
>
>>
>> Thoughts?
>>
>> Cheers,
>> Juan Vuletich
>>
>
>
>
>
>