Let $A \in \mathbb{C}^{N \times M}$ be a D999: Complex matrix such that

(i)	$N, M \in \{ 2, 3, 4, \ldots \}$ are each a D5094: Positive integer
(ii)	$n \in \{ 1, \ldots, N \}$ is a D5094: Positive integer
(iii)	$m \in \{ 1, \ldots, M \}$ is a D5094: Positive integer

The standard submatrix for $A$ with respect to $(n, m)$ is the D999: Complex matrix \begin{equation} (\{ 1, \ldots, N \} \setminus \{ n \}) \times (\{ 1, \ldots, M \} \setminus \{ m \}), \quad (i, j) \mapsto A_{i, j} \end{equation}