# Matrix equation align - letters and matrices

I am trying to align a matrix equation so that the alignment it with the top of the column matrix A (not the centre as it is at the moment). Any help would be appreciated. Here is what I have at the moment:

\begin{document}
\begin{pmatrix}  && A^T &&  \end{pmatrix}  \textbf{B} \begin{pmatrix} \\ A \\ \\ \end{pmatrix} \begin{pmatrix}  \\ C \\ \\ \end{pmatrix} =  \begin{pmatrix}  && A^T &&  \end{pmatrix} \textbf{B} \begin{pmatrix} \\ y \\ \\ \end{pmatrix
\end{document}

• (1) welcome, (2) please post a full minimal example, there is no preamble in your example. Plus this is completely wrong \mathbf{\large{A$^\text{T}$}}, (a) \large does not take argumetns, (b) you are already in math mode so I do not understand the intension with the A$^\text{T}$. Please update your example. – daleif Jan 16 '15 at 19:02
• cheers, was just a culmination of lots of changes I had made. sorry to make it unclear – Karim Jan 16 '15 at 19:10
• Your code snippets are currently not compilable. – Mico Jan 16 '15 at 19:15
• This isn't exactly what you ask, but perhaps related: tex.stackexchange.com/questions/168035/… – Steven B. Segletes Jan 16 '15 at 21:40

You can construct a stackable matrix to insert your A^T in the top row so it aligns vertically with the top row of B:

\documentclass{article}
\usepackage{amsmath,bm}

\begin{document}
$\bm{A}^T \bm{B} = \begin{array}{@{}c@{}} (\begin{array}{c} \quad \bm{A} \quad \end{array}) \\ \mathstrut \\ \mathstrut \end{array} \left( \begin{array}{c} \mathstrut \\ \bm{B} \\ \mathstrut \end{array}\right)$

\end{document}


The use of \mathstrut is not all that necessary here.

I prefer the regular notation, to the left of the equal sign.