The norm function computes the nth norm of the polynomial a in the indeterminates v. For  $1\le n$ the norm is defined:

If v is not specified, the $\mathrm{indets}\left(a\right)$ are used.

$\mathrm{norm}\left(x-3y\,1\right)$

$4$

$\mathrm{norm}\left(x-3y\,2\right)$

$\sqrt{10}$

$\mathrm{norm}\left(x-3y\,\mathrm{\infty }\right)$

$3$