Four Square Theorem - Quaternions, PDF, Prime Number

Jacobi's four-square theorem - Wikipedia

Solved In Number Theory, Lagrange'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

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)

Lagrange's three square theorem

Sum of Squares Function -- from Wolfram MathWorld

Theorems Rectangle Rhombus Square (examples, solutions, worksheets, videos, games, activities)

Waring's Problem -- from Wolfram MathWorld

An Independent Quaternion Proof of Jacobi's Four Square Theorem

SOLUTION: Legendre's two, three and four square theorem (number