# Aligning bmatrix-matrices next to each other?

I have this code:

$\begin{bmatrix} Pagerank&Sidnummer\\ 0.068945&2\\ 0.068945&3\\ 0.076517&1\\ 0.076517&4\\ 0.11536&7\\ 0.11536&8\\ 0.11536&6\\ 0.11536&5\\ 0.14069&9\\ 0.14069&12\\ 0.16501&14\\ 0.33015&13\\ 0.33015&15\\ 0.56601&10\\ 0.56601&11\\ \end{bmatrix}$
$\begin{bmatrix} Pagerank&Sidnummer\\ 0.076517&1\\ 0.068945&2\\ 0.068945&3\\ 0.076517&4\\ 0.11536&5\\ 0.11536&6\\ 0.11536&7\\ 0.11536&8\\ 0.14069&9\\ 0.56601&10\\ 0.56601&11\\ 0.14069&12\\ 0.33015&13\\ 0.16501&14\\ 0.33015&15\\ \end{bmatrix}$

And individually the matrices are correct. But I don't like the way they display on the screen. The second matrix is placed beneath the first one. I want them to share the horizontal space and lay next to each other. Is this possible?

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and btw I read tex.stackexchange.com/questions/9901/… but if I remove the ] [ that are in between the two matrices, it results in many errors. –  Calle May 6 '11 at 20:13
You can remove ] and [ but without leaving any blank lines; in my answer I used % to comment out one blank line between the matrices thus making the code more "readable" while preventing an error. –  Gonzalo Medina May 6 '11 at 20:18

Place them inside the same displayed environment:

\documentclass[a4paper,10pt]{article}
\usepackage{amsmath}

\begin{document}

$\begin{bmatrix} \textrm{Pagerank} & \textrm{Sidnummer}\\ 0.068945&2\\ 0.068945&3\\ 0.076517&1\\ 0.076517&4\\ 0.11536&7\\ 0.11536&8\\ 0.11536&6\\ 0.11536&5\\ 0.14069&9\\ 0.14069&12\\ 0.16501&14\\ 0.33015&13\\ 0.33015&15\\ 0.56601&10\\ 0.56601&11\\ \end{bmatrix}%\hspace*{20pt} % to increase the horizontal space % \begin{bmatrix} \textrm{Pagerank} & \textrm{Sidnummer}\\ 0.076517&1\\ 0.068945&2\\ 0.068945&3\\ 0.076517&4\\ 0.11536&5\\ 0.11536&6\\ 0.11536&7\\ 0.11536&8\\ 0.14069&9\\ 0.56601&10\\ 0.56601&11\\ 0.14069&12\\ 0.33015&13\\ 0.16501&14\\ 0.33015&15\\ \end{bmatrix}$

\end{document}

Note that I used the \textrm command to change the font for the text part. You can use \hspace to increase the horizontal separation between the matrices (commented out in my example).

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Thank you, that worked. The % in between the two matrices seem to be key, if I remove it I get an error. Why is that? I'm marking this as the correct solution, it works perfect. –  Calle May 6 '11 at 20:21
@Calle: \par is not allowed in math mode; leaving a blank line is equivalent to using \par and this will trigger an error (tipically the well known Missing \$ inserted). –  Gonzalo Medina May 6 '11 at 20:27