$p$	$=$	$\left(\begin{array}{c}\hfill p_x\hfill \\ \hfill p_y\hfill \\ \hfill p_z\hfill \\ \hfill \hfill \end{array}\right)$ .
Betrag des Vektors:
$\left|p\right|$	$=$	$\sqrt{p_x^2+p_y^2+p_z^2}$