Hello,
Сергей Олегович writes:
> I want to use a matrix environment that is included in an outer
> environment, so:
>
> ```
> Environment:
> \begin{equation*}
> \left|
> \begin{matrix}
> a_1 & b_1\\
> a_2 & b_2
> \end{matrix}
> \right|
> \end{equation*}
>
> Display--math:
> \[
> \left|
>
I want to use a matrix environment that is included in an outer
environment, so:
```
Environment:
\begin{equation*}
\left|
\begin{matrix}
a_1 & b_1\\
a_2 & b_2
\end{matrix}
\right|
\end{equation*}
Display--math:
\[
\left|
\begin{matrix}
a_1 & b_1\\
a_2 & b_2
\end{matrix}
\right|
\]
