Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Tim Rentsch
Newsgroups: comp.lang.c
Subject: Re: More complex numbers than reals?
Date: Mon, 08 Jul 2024 18:56:34 -0700
Organization: A noiseless patient Spider
Lines: 26
Message-ID: <861q43ba5p.fsf@linuxsc.com>
References: <87msmrsd6f.fsf@bsb.me.uk>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Injection-Date: Tue, 09 Jul 2024 03:56:34 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="4404f50b61bba69374b6468dfb9554fc";
logging-data="1156329"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+BeKTulMI2vaeRXQaQo6ev8iYPy66zwt8="
User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.4 (gnu/linux)
Cancel-Lock: sha1:EZz+zacPQxlQLrSqVD4bg7TIxZA=
sha1:SLhpTe6Iv8ktRUc/Wdoz4n/JisE=
Bytes: 2108
James Kuyper writes:
> On 7/8/24 18:59, Ben Bacarisse wrote:
>
>> "Chris M. Thomasson" writes:
>>
>>> Are there "more" complex numbers than reals?
>>
>> If you ask this in an appropriate group (sci.math?) I'll answer. Can
>> you really think this is topical in comp.lang.c?
>
> I haven't seen more of Chris's message than what you've quoted. In the
> context of C, it's a easy (even trivial) question to answer.
>
> "Each complex type has the same representation and alignment
> requirements as an array type containing exactly two elements of the
> corresponding real type; the first element is equal to the real part,
> and the second element to the imaginary part, of the complex number."
> (6.2.5p17).
>
> Therefore, the number of different complex numbers that can be
> represented is therefore the square of the number of different numbers
> that can be represented in the corresponding real type.
The answer is still no, because the question is about complex
numbers and real numbers, not representable values.