Lagrange's four-square theorem - Wikipedia

Seatings and Sums of Squares

Table 3 from Extended Lagrange's four-square theorem

PDF) A Simple Proof of Jacobi's Four-Square Theorem

Lagrange's Four-Square Theorem -- from Wolfram MathWorld

SOLVED: 8.35 (Lagrange's Four-Square Theorem) If n is a natural number, it can be expressed as the sum of four squares. A lattice in 4-space is a set of the form (x,y,z,w)

Four Square Theorem - Quaternions, PDF, Prime Number

Lagrange's three square theorem

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

Euler's four-square identity - Wikipedia

MathType - Lagrange's four-square theorem states that every natural number can be represented as the sum of four integer squares. Proved by Joseph Louis #Lagrange in 1770, it can be regarded as