Lagrange's three square theorem

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

Table 1 from Extended Lagrange's four-square theorem

Lagrange's four-square theorem

Jacobi's four-square theorem - Wikipedia

Triangle with Squares 6: Four squares. Level: High School, SAT Prep, College geometry Antonio Gutierrez

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

SOLVED: Theorem 8.35 (Lagrange's Four-Square Theorem) then n can be expressed as the sum If n is a number; of four squares: natural lattice A in 4-space is a set of the

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

Euler Four-Square Identity -- from Wolfram MathWorld

Lagrange's Four-Square Theorem Seen Using Polygons and Lines - Wolfram Demonstrations Project