Jacobi's four-square theorem - Wikipedia

Lagrange's four-square theorem - Wikipedia

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

Chit-chat on Lagrange's four-square theorem

Seatings and Sums of Squares

Table 3 from Extended Lagrange's four-square theorem

Chapter 3 Greek Number Theory The Role of Number Theory Polygonal, Prime and Perfect Numbers The Euclidean Algorithm Pell's Equation The Chord and Tangent. - ppt download

PPT - Waring's Problem PowerPoint Presentation, free download - ID:4504701

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

Waring's Problem -- from Wolfram MathWorld