## Arithmetic functions: definitions and some properties

In this article we'll discuss arithmetic functions, that are functions defined on positive integers; the value of such functions, however,…

Multa non quia difficilia sunt non audemus sed quia non audemus sunt difficilia

In this article we'll discuss arithmetic functions, that are functions defined on positive integers; the value of such functions, however,…

Molte cose non è perché sono difficili che non osiamo farle,

ma è perché non osiamo farle che sono difficili

Many times, it is not because things are difficult that we do not dare,

but it is because we do not dare that things are difficult

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