Is Gamma Irrational? Investigating the Irrationality of Pi and e

  • Context: Graduate 
  • Thread starter Thread starter Pjennings
  • Start date Start date
  • Tags Tags
    Irrational Proof
Click For Summary
SUMMARY

The discussion centers on the irrationality of the expression pi^e, with the author attempting to prove its irrationality by rewriting e as a series expansion. They express that while individual terms derived from this series are irrational, demonstrating that their product remains irrational poses a significant challenge. The conversation also touches on the unresolved question of whether pi + e is irrational, and the author expresses a particular interest in the irrationality of the Euler-Mascheroni constant, gamma (γ).

PREREQUISITES
  • Understanding of irrational numbers and their properties
  • Familiarity with series expansions, particularly Taylor series
  • Knowledge of mathematical proofs and techniques for proving irrationality
  • Basic concepts of transcendental numbers, specifically pi and e
NEXT STEPS
  • Research techniques for proving the irrationality of numbers, focusing on pi and e
  • Explore the properties of the Euler-Mascheroni constant (γ) and its significance in number theory
  • Study the implications of series convergence and divergence in relation to irrational numbers
  • Investigate existing literature on the irrationality of sums and products of known irrational numbers
USEFUL FOR

Mathematicians, number theorists, and students interested in advanced topics related to irrational numbers and mathematical proofs.

Pjennings
Messages
17
Reaction score
0
I've been thinking about pi^e lately, and trying to prove that it is irrational. By rewriting e as 1+1+1/2+1/3!+...+1/n! I got it to pi^2*pi^(1/2)*pi^(1/3!)*...*pi^(1/n!), and proved that each of these terms is irrational. I'm stuck when it comes to showing that multiplied together these numbers are irrational. Any ideas?
 
Physics news on Phys.org
Although we know a lot about certain forms, proving numbers irrational is generally a very, very hard thing to do. For example, I think we don't even know whether or not pi+e is irrational!
 
I don't think that is a workable approach, since it's possible to form a rational number as the series where the partial sums are all irrational.
 
No, we do not know if pi+e is irrational, but I don't think that one is very interesting. I think it would be interesting to know if γ(gamma) is irrational though.
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 33 ·
2
Replies
33
Views
4K
  • · Replies 26 ·
Replies
26
Views
958
  • · Replies 15 ·
Replies
15
Views
9K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 0 ·
Replies
0
Views
2K
  • · Replies 7 ·
Replies
7
Views
6K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 36 ·
2
Replies
36
Views
4K
  • · Replies 9 ·
Replies
9
Views
5K