# Custom align, three \beta = statements, so the beta is custom aligned vertically, and the matrices/vectors are all vertically aligned

Something like:

So that the three forms of beta fit on one line.

I want the \beta = to valign with the first element of the vector/matrix.

I want all the remaining betas to be in the same position.

I want the [] matrix/vectors to be all vertically aligned.

I want it to work within environment, \begin{align} environment, \begin{array} environment, $math$, and/or 

monte

{x:

UPDATE Verifying that solution provided by David Carlisle works with font size changes

\documentclass[10pt]{article}

\usepackage{delarray}

\DeclareMathSizes{10}{24}{14}{14}

\begin{document}
$\beta = \begin{array}[t]\lbrack{c}\rbrack v_1\\ v_2 \\ v_3 \\ v_4 \end{array} , \quad \beta = \begin{array}[t]\lbrack{c}\rbrack v_1\\ v_2 \\ v_3 \\ v_4 \\ v_5 \\ v_6 \end{array} , \quad \beta = \begin{array}[t]\lbrack{c}\rbrack v_1\\ v_2 \\ v_3 \\ v_4 \\ v_5 \\ v_6 \\ v_7 \\ v_8 \\ v_9 \end{array} .$
\end{document}


Result

\documentclass{article}
$\begin{array}[t]\lbrack{c}\rbrack 1\\2\\3\end{array} + \begin{array}[t]\lbrack{c}\rbrack 1\\2\\3\\4\\5\end{array}$

• really, there should be a general question about how to use [t], [b], and [c] to align various objects. – barbara beeton Feb 8 '16 at 11:38
• @barbarabeeton although here it is specific delarray package syntax, if you use \left[\begin{array}[t] you get something rather different. – David Carlisle Feb 8 '16 at 12:20