Question 8. The usual order relation > on R satisfies the two conditions (a) if x 0, then precisely one of x > 0 or -x > 0 holds; and (b) if x, y> 0, then x + y> 0 and xy > 0. Show that there does not exist a relation > on C which satisfies both these conditions. Thus there is no natural ordering on the complex numbers. Inequalities hold between real numbers, as usual, but no meaningful inequalities hold between complex numbers.
Question 8. The usual order relation > on R satisfies the two conditions (a) if x 0, then precisely one of x > 0 or -x > 0 holds; and (b) if x, y> 0, then x + y> 0 and xy > 0. Show that there does not exist a relation > on C which satisfies both these conditions. Thus there is no natural ordering on the complex numbers. Inequalities hold between real numbers, as usual, but no meaningful inequalities hold between complex numbers.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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
Transcribed Image Text:Question 8. The usual order relation > on R satisfies the two conditions
(a) if x # 0, then precisely one of x > 0 or −x > 0 holds; and
(b) if x, y > 0, then x + y > 0 and xy > 0.
Show that there does not exist a relation > on C which satisfies both these conditions.
Thus there is no natural ordering on the complex numbers. Inequalities hold between
real numbers, as usual, but no meaningful inequalities hold between complex numbers.
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