Euler's four-square identity

Lagrange's four-square theorem

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

Lagrange's Four-Square Theorem -- from Wolfram MathWorld

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

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

Stable/Patient Sort: Bit-Manipulation-To-Solve-Problems-Easily-And-Efficiently, PDF, Square Root

PPT - Combinatorial Geometry PowerPoint Presentation, free download - ID:4886808

Euler's four-square identity - Wikipedia

Euler Four-Square Identity -- from Wolfram MathWorld

An Independent Quaternion Proof of Jacobi's Four Square Theorem