	A₁	A₂	$\dots$	A_n
A₁	a₁₁	a₁₂	$\dots$	a_1n
A₂	a₂₁	a₂₂	$\dots$	a_2n
$\dots$	$\dots$	$\dots$	$⋱$	$\dots$
A_m	a_m₁	a_m₂	$\dots$	a_mn