Harmonic Series is Divergent/Historical Note

Historical Note on Harmonic Series is Divergent
The proof that the Harmonic Series is Divergent was discovered by.

However, it was lost for centuries, before being rediscovered by in $1647$.

It was discovered yet again in $1687$ by, and a short time after that by , after whom it is usually (erroneously) attributed.

Some sources attribute its rediscovery to.