I would like to create a formula or figure like this:
I tried it simply with the pmatrix
environment and the \boxed
command, but the spacing looked horrible. I think it might be done with TikZ, but I don't know much about it.
Edit:
Here is what I got so far for the right-hand side:
\documentclass{article}
\usepackage{amsmath,amsthm,amsfonts,amssymb}
\usepackage{tikz}
\usetikzlibrary{arrows,matrix,positioning}
\begin{document}
\begin{tikzpicture}
\matrix [matrix of math nodes,left delimiter=(,right delimiter=)] (m)
{
A_1 & \phantom{A_1} & \phantom{A_1} & \\
\phantom{A_1} & \phantom{A_1} & & \\
\phantom{A_1} & & A_2 & \\
& & & A_2 & \phantom{A_3}\\
& & & \phantom{A_2} & A_3 \\
};
\draw (m-1-1.north west) -- (m-1-2.north east) -- (m-2-2.south east) -- (m-2-1.south west) -- (m-1-1.north west);
\draw (m-3-3.north west) -- (m-3-3.north east) -- (m-3-3.south east) -- (m-3-3.south west) -- (m-3-3.north west);
\draw (m-4-4.north west) -- (m-4-4.north east) -- (m-4-4.south east) -- (m-4-4.south west) -- (m-4-4.north west);
\draw (m-1-1.north west) -- (m-1-3.north east) -- (m-3-3.south east) -- (m-3-1.south west) -- (m-1-1.north west);
\draw (m-5-5.north west) -- (m-5-5.north east) -- (m-5-5.south east) -- (m-5-5.south west) -- (m-5-5.north west);
\draw (m-4-4.north west) -- (m-4-5.north east) -- (m-5-5.south east) -- (m-5-4.south west) -- (m-4-4.north west);
\end{tikzpicture}
\end{document}
What I hope to achieve is
- square boxes,
$A_1$
centered in the$2\times 2$
box,- also the left-hand side and the
$\subset$
sign in the middle.
Comment: I have no idea what I did wrong in the formatting of this question.
\multicolumn
and\multirow
.\multirow
works in tikz? It throwsError: Undefined control sequence.
@Peter Jansson: sorry for the discussion, but I'd like to make it work.