## The sieve of Erathostenes and the formal definition of sieve

In the previous article we saw that the proof of Chen's Theorem is based on sieve theory. But what is…

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

In the previous article we saw that the proof of Chen's Theorem is based on sieve theory. But what is…

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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