Formula:8726

Digital Library of Mathematical Functions ID 27.6.E1

${\displaystyle{\displaystyle\sum_{d\mathbin{|}n}\lambda\left(d\right)=\begin{cases}1,&n\mbox{ is a square},\\ 0,&\mbox{otherwise}.\end{cases}}}$

Symbols List

• ${\displaystyle{\displaystyle\lambda\left(\NVar{n}\right)}}$: Liouville’s function
• ${\displaystyle{\displaystyle d}}$: positive integer
• ${\displaystyle{\displaystyle n}}$: positive integer
 

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