psi function

The term "psi function" has multiple meanings in mathematics and physics, often denoted by the Greek letter ψ, and is used in various specialized contexts.

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Definition

C2Quantum Mechanics

(technical, academic)A mathematical description of the quantum state of a system, used to calculate the probabilities of different outcomes in measurements.

Example

  • The psi function is essential for determining the probability density of a particle's position.

C1Special Functions

(technical, academic)The logarithmic derivative of the gamma function, used in calculus and complex analysis.

Example

  • The digamma function, or psi function, appears frequently in advanced mathematical problems.

C2Number Theory

(technical, academic)A summatory function related to the distribution of prime numbers.

Example

  • The Chebyshev psi function helps in the study of prime number distribution.