The Zero(m) command returns a zero element of a magma m with a zero.  If the magma has no zero element, then an exception is raised.  In the case in which a magma has multiple zeroes, the first one found is returned.

$\mathrm{with}\left(\mathrm{Magma}\right)\:$

$m≔⟨⟨⟨1\|2\|3⟩\,⟨2\|2\|2⟩\,⟨3\|2\|1⟩⟩⟩$

$m≔\left[\begin{array}{ccc}1& 2& 3\\ 2& 2& 2\\ 3& 2& 1\end{array}\right]$

$\mathrm{Zero}\left(m\right)$

$2$

The Magma[Zero] command was introduced in Maple 15.

For more information on Maple 15 changes, see Updates in Maple 15.