A\ =\ \begin{pmatrix}_{\ }a_{\tiny 11}\ & a_{\tiny 12}\ & a_{\tiny 13}_{\ }\\\ a_{\tiny 21}\ & a_{\tiny 22}\ & a_{\tiny 23} \\^{\ }a_{\tiny 31}\ & a_{\tiny 32}\ & a_{\tiny 33}^{\ }\end{pmatrix}