MathType - Lagrange's four-square theorem states that every natural number can be represented as the sum of four integer squares. Proved by Joseph Louis #Lagrange in 1770, it can be regarded as
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What is lagrange theorem? - Quora
Sum of four Squares
Solved Joseph Louis Lagrange (1736-1813) conjectured that
Lagrange's four-square theorem - Wikipedia
SOLVED: 8.35 (Lagrange's Four-Square Theorem) If n is a natural
Solved Lagrange's four square theorem says every natural
Euler's four-square identity
Chit-chat on Lagrange's four-square theorem
SOLVED: 8.35 (Lagrange's Four-Square Theorem) If n is a natural
Sum of four Squares