ellipses latex vertical code example
Example: vertical dots latex
$$
\Sigma=\left[
\begin{array}{ccc}
\sigma_{11} & \cdots & \sigma_{1n} \\
\vdots & \ddots & \vdots \\
\sigma_{n1} & \cdots & \sigma_{nn}
\end{array}
\right]
$$
$$
\Sigma=\left[
\begin{array}{ccc}
\sigma_{11} & \cdots & \sigma_{1n} \\
\vdots & \ddots & \vdots \\
\sigma_{n1} & \cdots & \sigma_{nn}
\end{array}
\right]
$$