Euler's four-square identity
Por um escritor misterioso
Descrição
Abstract Algebra: quaternions and 4 square identity, Kronecker Thm
Euler's formula, Definition & Facts
PDF) Sums of four squares and Waring's Problem
Tikalon Blog by Dev Gualtieri
A Hidden Orthogonal Latin Square in a Work of Euler from 1770
SOLVED: Theorem 8.35 (Lagrange's Four-Square Theorem) then n can
Lagrange's Four-Square Theorem -- from Wolfram MathWorld
Sum of Four Squares
Waring's Problem -- from Wolfram MathWorld
Waring's Problem -- from Wolfram MathWorld
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