E552 -- Observationes circa divisionem quadratorum per numeros primos

(Observations about the division of squares by prime numbers)


Euler begins with a review of the funamental properties of quadratic residues, as outlined in E242, e.g. conditions for -1 to be a quadratic residue (theorems 4 & 5).

According to the records, it was presented to the St. Petersburg Academy on May 18, 1772.

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