# how to code left facing bracket of values with single value to its right?

How can I make a vector in this form?

• This question is answered here. – audiophiel Jul 9 '16 at 21:17

You can do that in two ways: either with the mathtools package (needless to load amsmath) or with the blkarray package. Math tools defines rcases and drcases environments (the latter is the displaystyle version of the former):
\documentclass{article}
$\begin{rcases} -1 \\ \hphantom{-} \vdots \\ -1 \end{rcases}m \qquad \begin{blockarray}[t]{c \Right{\}}{\, m }}-1 \\ \hphantom{-} \vdots \\ -1 \end{blockarray}$