MHB Are Non-Ordered Numbers More Than Complex Numbers?

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Complex numbers are not ordered, and other examples of non-ordered numbers include quaternions, octonions, Gaussian integers, and integers modulo n. Infinitesimal numbers can be considered ordered, with distinctions between different infinitesimals. A positive infinitesimal ε and its corresponding infinity ω illustrate this ordering. The discussion also highlights a grammatical correction regarding the use of "infinitesimally" versus "infinitesimal" when referring to numbers. Understanding these concepts is essential for grasping the nature of non-ordered and infinitesimal numbers.
highmath
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1. The complex number are not ordered. Which else number are not ordered?
2. Are the infinitesimally numbers are ordered numbers? It there a difference between infinitesimally number to another infinitesimally number?
 
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highmath said:
1. The complex number are not ordered. Which else number are not ordered?
2. Are the infinitesimally numbers are ordered numbers? It there a difference between infinitesimally number to another infinitesimally number?
I'm not going to write it out again. Please see your question here. If you don't understand the response please say so on this or the other site.

-Dan
 
highmath said:
1. The complex number are not ordered. Which else number are not ordered?

Other examples: Quaternion numbers ($\mathbb H$), Octonion numbers, Gaussian integers ($\mathbb Z(i)$), integers modulo $n$ ($\mathbb Z_n=\mathbb Z/n\mathbb Z$ or $F_n$).

highmath said:
2. Are the infinitesimally numbers are ordered numbers? It there a difference between infinitesimally number to another infinitesimally number?

Yes.
Let $\varepsilon$ be a positive infinitesimal, and let $\omega=\frac 1\varepsilon$ be the corresponding infinity.
Then:
$$2<2+\varepsilon<2+2\varepsilon<\frac\omega 2<\omega-\varepsilon<\omega<\omega+1+\varepsilon$$
 
By the way "infinitesimally", ending in "ly", is an adverb and cannot modify a noun like "numbers". The corresponding adjective is "infintesmal" You want to talk about "infinitesimal numbers" not "infinitesimally numbers".
 

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