Waring's Problem -- from Wolfram MathWorld

Lagrange's four-square theorem - Wikipedia

Solved In Number Theory, Lagrange's four-square theorem

Lagrange's four-square theorem

GitHub - crteezy/java-lagrange-four-square-algorithm: Lagrange's four-square theorem algorithm using Java recursion

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)

Square Number Definition & Meaning

Lagrange's Four Squares Theorem

Lagrange's Four Square Theorem

Pythagorean Theorem

PDF) Sums of four squares and Waring's Problem