Re: More complex numbers than reals?

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Sujet : Re: More complex numbers than reals?
De : invalid (at) *nospam* example.invalid (Moebius)
Groupes : sci.math
Date : 10. Jul 2024, 22:39:59
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Organisation : A noiseless patient Spider
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Am 10.07.2024 um 23:23 schrieb Chris M. Thomasson:

Well, it missed an infinite number of reals between 1 and 2. So, the reals are denser than the naturals. Fair enough?
In a certain sense, yes.
On the other hand, the rational numbers are "denser than the naturals" too (in this sense). Still, the set of rational numbers has the same "size" as the set of natural numbers.
Man, try to comprehend that once and for all. :-P
(Mückenheim never succeeded concerning this point. Please try to avoid this rabbit hole.)

It just seems to have "more", so to speak.
Exactly!
The real numbers actually do, while the rational numbers don't.

Perhaps using the word "more" is just wrong.
EXACTLY. Well, it's certainly "misleading" when dealing with INFIITE SETS!
That's the very point Mückenheim can't comprehend.

However, the density of an infinity makes sense to me. Not sure why, it just does...
It does.
Hint: Between any two (different) rational or real numbers there's another rational / real number.
That's not the case for natural numbers. They are not "dense".

The set of evens and odds has an [countably] infinite number of elements. Just like the set of naturals.
Exactly.
Thats why we accept (in set theory) that these sets have "the same size". (Of course, this is by convention. But so what?)

Date Sujet#  Auteur
9 Jul 24 * More complex numbers than reals?381Chris M. Thomasson
9 Jul 24 +* Re: More complex numbers than reals?7FromTheRafters
9 Jul 24 i`* Re: More complex numbers than reals?6FromTheRafters
9 Jul 24 i +- Re: More complex numbers than reals?1Alan Mackenzie
9 Jul 24 i `* Re: More complex numbers than reals?4Chris M. Thomasson
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10 Jul 24 i  `- Re: More complex numbers than reals?1Moebius
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9 Jul 24 i i+* Re: More complex numbers than reals?264Chris M. Thomasson
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10 Jul 24 i ii+* Re: More complex numbers than reals?8FromTheRafters
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10 Jul 24 i ii i+- Re: More complex numbers than reals?1Chris M. Thomasson
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10 Jul 24 i ii `* Re: More complex numbers than reals?248Chris M. Thomasson
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11 Jul 24 i ii   `* Re: More complex numbers than reals?245Chris M. Thomasson
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