The HasRightIdentity command determines whether a magma m has a right identity element.  It returns true if m has a right identity element, and returns false' otherwise.

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

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

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

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

$\mathrm{true}$

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

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