[texhax] Matrix aligment

[Goebel, Juergen, OPES26]

> Andrei wrote:

> \usepackage{amsmath}
> \begin{gather}
>    \begin{matrix}
>       -1&1&1
>        1&1&1
>    \end{matrix}
> \end{gather}

One possibility should be:

> \usepackage{amsmath}
> \begin{gather}
>    \begin{matrix}
>       -1&1&1
>       \hphantom{-}1&1&1
>    \end{matrix}
> \end{gather}

Greetings,

Juergen