ζ(3)

Definition

The term ζ(3) refers to the Riemann zeta function evaluated at 3, which is known to be a special value that has significant implications in number theory and mathematical physics. It is defined as the infinite series $$ ext{ζ}(s) = rac{1}{1^s} + rac{1}{2^s} + rac{1}{3^s} + ext{...}$$ for $$s > 1$$, and ζ(3) specifically equals the sum of the inverses of the cubes of natural numbers. This value is also related to various areas, such as modular forms and quantum physics.

5 Must Know Facts For Your Next Test

1. The value ζ(3) is known as Apéry's constant, named after Roger Apéry who proved that it is irrational in 1979.
2. Unlike ζ(2), which equals $$rac{ ext{π}^2}{6}$$, ζ(3) does not have a simple closed form but can be numerically approximated to about 1.2020569.
3. The importance of ζ(3) extends into number theory, especially in relation to the distribution of prime numbers and in problems involving sums of cubes.
4. ζ(3) appears in various mathematical contexts, including quantum field theory, where it plays a role in calculations involving loop diagrams.
5. Research continues to explore potential relationships between ζ(3) and other mathematical constants, as well as its place within the broader framework of the zeta function.

Review Questions

• How does the evaluation of ζ(3) at 3 differ from other special values of the Riemann zeta function, such as ζ(2)?
  • While ζ(2) has a well-known closed form expressed as $$\frac{\pi^2}{6}$$, ζ(3) does not have a similarly simple expression and is often referred to as Apéry's constant. This difference highlights not only a contrast in their mathematical properties but also suggests that ζ(3) has more complex behaviors that are still being investigated. The irrationality of ζ(3), proven by Apéry, further distinguishes it from some other special values like ζ(2).
• Discuss the significance of Apéry's proof regarding the irrationality of ζ(3) and its impact on mathematics.
  • Apéry's proof established that ζ(3) is irrational, which was a major result in number theory. This finding opened up new avenues for research and understanding regarding transcendental numbers and special values of zeta functions. It also encouraged mathematicians to look for similar results for other values, such as whether ζ(5) is also irrational, and it has influenced fields ranging from algebraic geometry to quantum physics.
• Evaluate how ζ(3)'s relationship with prime numbers influences contemporary research in number theory.
  • The connection between ζ(3) and prime numbers reflects deeper insights into the distribution of primes. Research often investigates how sums involving primes relate back to special values like ζ(3), potentially leading to new conjectures or theorems about prime distribution. By understanding these relationships better, mathematicians can develop more robust theories about number patterns, influencing both theoretical mathematics and practical applications in cryptography and computer science.

Related terms

Riemann zeta function: A complex function defined for complex numbers that generalizes the sum of the reciprocals of the powers of natural numbers.

Euler's formula: A formula in mathematics that establishes the deep relationship between trigonometric functions and the complex exponential function.

Special values: Specific outputs of mathematical functions that are often of particular interest due to their unique properties or significance in various fields.