Definition:Second Chebyshev Function/Definition 2
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Definition
The second Chebyshev Function $\psi: \R \to \R$ is defined as:
- $\ds \forall x \in \R: \map \psi x := \sum_{1 \mathop \le n \mathop \le x} \map \Lambda n$
where $\Lambda$ is the von Mangoldt function.
Also see
Source of Name
This entry was named for Pafnuty Lvovich Chebyshev.