Source: cirosantilli/lagrange-s-four-square-theorem
= Lagrange's four-square theorem
{c}
{title2=Every natural number is a sum of four squares}
{title2=1770}
{wiki}
= Lagrange's four-square theorem
{c}
{title2=Every natural number is a sum of four squares}
{title2=1770}
{wiki}