PDF) Quarternions and the Four Square Theorem

The Four Square Theorem was proved by Lagrange in 1770: ev- ery positive integer is the sum of at most four squares of positive integers, i.e. n = A2 +B2 +C2 +D2;A;B;C;D 2 Z An interesting proof is presented here based on Hurwitz integers, a subset

LAGRANGE'S FOUR SQUARE THEOREM Theorems, Lagrange theorem, Number theory

Solving Sums of Squares in Global Fields Proceedings of the 2022 International Symposium on Symbolic and Algebraic Computation

Lagrange's four-square theorem - Wikipedia

Modern algebra, Algebraic Structures, Rings & Group Theory

Chit-chat on Lagrange's four-square theorem

Only Computers Can Solve This Map-Coloring Problem From the 1800s

Commutative quaternion algebra and DSP fundamental properties: Quaternion convolution and Fourier transform - ScienceDirect

PDF) A Simple Proof of Jacobi's Four-Square Theorem

Open-source software library for real-time inertial measurement unit data-based inverse kinematics using OpenSim [PeerJ]