Colles de mathématiques

$\R^3$

$x = (2, 1, 3)$

$y = (0, -1, -1)$

$z = (2, 1, -1)$

$x = (1, 1, 1)$

$y = (2, 0, -2)$

$x = (1, -1, -2)$

$y = (2, 3, 1)$

$z = (-1, -1, 2)$

$x = (1, 0, 2)$

$y = (-1, 3, -1)$

$z = (2, 1, 1)$

$w = (3, 2, -1)$