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Lagrange's four-square theorem - Wikipedia

Chit-chat on Lagrange's four-square theorem

Solved Theorem 8.35 (Lagrange's Four-Square Theorem) If n is

Lagrange's four-square theorem - Wikiwand

Lagrange's four-square theorem

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)

FERMAT'S FOUR SQUARES THEOREM Several years ago, after

CodeChef - Lagrange's four-square theorem, also known as Bachet's conjecture, states that every natural number can be represented as the sum of four integer squares. This theorem was proven by Joseph Louis

Why was this visual proof missed for 400 years? (Fermat's two square theorem)

Waring's Problem -- from Wolfram MathWorld