E125 -- Consideratio progressionis cuiusdam ad circuli quadraturam inveniendam idoneae

(Consideration of a progression suitable for finding the quadrature of a circle)


Summary:

Euler presents an elementary derivation of a semi-convergent series for arctan, which is a special case of the Euler Summation Formula.

According to the records, it was presented to the St. Petersburg Academy on March 23, 1739.

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