[Cuis-dev] Some un-accurate information on The Cuis Book

[ken.dickey at whidbey.com]

Luciano,

Thanks so much for this explination!

I was looking for simplicity, but Complex "numbers" are not a kinds of 
Number and are not simple.

I think some "Here be Dragons" text should be added to 
Complex>>real:imaginary:

Perhaps something like the attached..

How does this look to you?

Thanks again,
-KenD
=====
On 2023-02-27 03:09, Luciano Notarfrancesco via Cuis-dev wrote:

> Hi Ken,
> I don't have a strong opinion about Complex and I'm cool with either 
> option, specially because it's not in the base image and because I 
> don't really use the package. But for this kind of situation I tried 
> both approaches (reducing them or not), and in general I decided to not 
> reduce them. One of the reasons is that if you reduce them then you 
> might end up with a Number instead of an instance of Complex, and for 
> it to be consistent you'd have to implement the Complex protocol in 
> Number, or you might get a MNU. In fact I ended up implementing my own 
> "fractions" (that I call Rational) and they don't reduce to integers. 
> Another reason for doing it like this with fractions and other 
> "numbers" is to avoid ambiguities, for example I have the message 
> isUnit that returns true if the element has an inverse, and for example 
> the rational number 2/1 is a unit (the inverse is 1/2) but the integer 
> 2 is not a unit.
> 
> Cheers,
> Luciano
> 
> On Sun, 26 Feb 2023 at 20:48 ken.dickey--- via Cuis-dev 
> <cuis-dev at lists.cuis.st> wrote:
> 
>> On 2023-02-26 05:31, ken.dickey--- via Cuis-dev wrote:
>> 
>>> BTW, we can do better.  I think -4+0i above should be and print as 
>>> -4.
>> 
>> Ah! The code is already there and just needed to be uncommented
>> (attached).
>> 
>> As we have Complex>>basicReal:imaginary: why does
>> Complex>>real:imaginary not do the simplification?  Can we not just
>> enable this?
>> 
>> Thanks,
>> -KenD
>> --
>> Cuis-dev mailing list
>> Cuis-dev at lists.cuis.st
>> https://lists.cuis.st/mailman/listinfo/cuis-dev
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