Dirichlet Convolution

by Hang Wu   Last Updated March 13, 2018 07:20 AM

I was wondering how to simplify the expression: $id \ast (\mu\phi)$, where $\ast$ denotes Dirichlet convolution, $\mu$ is the Mobius function, $\phi$ is the Euler's totient function and $id$ is the identity function. Juxtaposition represents pointwise multiplication.

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