Jacobi's four-square theorem - Wikipedia

LAGRANGE'S FOUR SQUARE THEOREM Theorems, Lagrange theorem, Number theory

Sum of four Squares

What is lagrange theorem? - Quora

Euler's four-square identity

5. * In the following sequence of problems, we will

PDF] New parametrization of $A^2+B^2+C^2=3D^2$ and Lagrange's four-square theorem

Waring's Problem & Lagrange's Four-Square Theorem

Four Square Theorem - Quaternions, PDF, Prime Number

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