Euler's four-square identity - Wikipedia

Lagrange's four-square theorem - Wikipedia

Lagrange's four-square theorem

Jacobi's four-square theorem - Wikipedia

Solved In Number Theory, Lagrange's four-square theorem

PDF) Extended Lagrange's four-square theorem

PDF) Algebraic Consequences of Jacobi's Two- and Four-Square Theorems

Solved QUADRA range's Four-Square Theorem) If n is a natural

Discrete quantum computation and Lagrange's four-square theorem

PDF) Sums of four squares and Waring's Problem

SOLVED: In the following sequence of problems, we will start the proof of the Four-Square Theorem conjectured in the third century by Diophantus and proven by Lagrange in 1770 (since it took