Is pi+e Algebraic? Debunking the Mystery

  • Thread starter gravenewworld
  • Start date
In summary, the conversation discusses the status of pi+e as an algebraic number. While there are no known proofs for or against its algebraicity, it is believed that at least one of pi+e and pi*e is transcendental. This is supported by the fact that both pi and e are transcendental, and algebraic coefficients would result in algebraic roots.
  • #1
gravenewworld
1,132
26
Is it algebraic? I remember my professor talking about this probelm, he just swept it under the rug. Are there any proofs that pi+e is algebraic or not?
 
Physics news on Phys.org
  • #3
also at least one of pi+e and pi-e must be transcendental (if they were both algebraic, so would be one half their sum and difference, ie pi and e would be algebraic).
 
  • #4
lets see if wolframs statement is obvious. consider (x-e)(x-pi) = x^2 - (e+pi)x + e*pi.

Now if both e+pi and e*pi were algebraic, then e and pi would be roots of an equation with algebraic coefficients, so wouldn't they both be algebraic?
 
  • #5
Yes, and since pi and e are both transcendental, the result follow. That the roots of a polynomial with algebraic coefficients are algebraic follows from the fact that if F2 is and algebraic extension of F1 and F1 is an algebraic extension of F, then F2 is an algebraic extension of F (F2, F1, F fields). Proof should be in most algebra texts and isn't too difficult.
 

FAQ: Is pi+e Algebraic? Debunking the Mystery

What is pi+e?

Pi (π) is a mathematical constant that represents the ratio of a circle's circumference to its diameter. It is approximately equal to 3.14159. E is another mathematical constant, also known as Euler's number, that is approximately equal to 2.71828.

Is pi+e an algebraic number?

No, pi+e is not an algebraic number. An algebraic number is a number that can be expressed as a finite combination of integers, addition, subtraction, multiplication, division, and taking roots. Since pi and e are both irrational numbers, their sum cannot be expressed in this form.

What makes a number algebraic?

A number is algebraic if it is a root of a non-zero polynomial equation with integer coefficients. In other words, it can be expressed as a finite combination of integers, addition, subtraction, multiplication, division, and taking roots.

Can pi+e be expressed as a fraction?

No, pi+e cannot be expressed as a fraction. As mentioned before, both pi and e are irrational numbers, meaning they cannot be expressed as a ratio of two integers. Therefore, their sum cannot be expressed as a fraction either.

Why is the question of whether pi+e is algebraic important?

The question of whether pi+e is algebraic is important because it sheds light on the nature of these two mathematical constants. It helps us understand that they cannot be expressed as a finite combination of simple operations and that they have unique properties that make them essential in many mathematical equations and applications.

Back
Top