Are Non-Ordered Numbers More Than Complex Numbers?

Click For Summary

Discussion Overview

The discussion revolves around the nature of non-ordered numbers, specifically focusing on complex numbers and infinitesimal numbers. Participants explore whether other types of numbers share this non-ordered characteristic and question the ordering of infinitesimals.

Discussion Character

  • Exploratory
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • Some participants assert that complex numbers are not ordered and inquire about other types of numbers that may also be non-ordered.
  • There is a question regarding whether infinitesimal numbers are ordered and if there is a distinction between different infinitesimal numbers.
  • One participant provides examples of other non-ordered number systems, including quaternions, octonions, Gaussian integers, and integers modulo n.
  • A mathematical representation is given to illustrate the relationship between a positive infinitesimal and its corresponding infinity, suggesting a specific ordering among certain infinitesimal values.
  • A participant corrects the terminology used for infinitesimal numbers, indicating that "infinitesimally" is an adverb and should not modify the noun "numbers." The correct term is "infinitesimal numbers."

Areas of Agreement / Disagreement

Participants express differing views on the ordering of infinitesimal numbers, with some suggesting a specific ordering while others question the nature of infinitesimals. There is no consensus on the broader question of which other numbers are non-ordered.

Contextual Notes

The discussion includes unresolved questions about the definitions and properties of infinitesimal numbers, as well as the implications of ordering in various number systems. Some mathematical steps and assumptions remain unaddressed.

highmath
Messages
35
Reaction score
0
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?
 
Physics news on Phys.org
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".
 

Similar threads

  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 0 ·
Replies
0
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K