Vaughan's identity
= Vaughan's identity
{wiki=Vaughan's_identity}
Vaughan's identity is an important result in analytic number theory, particularly in the context of additive number theory and the study of sums of arithmetic functions. The identity provides a way to express the sum of a function over a set of integers in terms of more manageable sums and is often used in the context of problems involving the distribution of prime numbers.