I was wondering if anyone knew how to draw 3 dots in a matrix that go in a diagonal way usually to represent that element flow similarily in the slots. I know there's one that goes in the bottom right corner. But is there one that goes in the bottom left?
[Tex/LaTex] 3 dots in matrix
matricessymbols
Related Solutions
Here's a possible code for the first matrix:
\documentclass{book}
\usepackage{easybmat}
\begin{document}
\[
A= \delta^{-2}
\left(
\begin{BMAT}[8pt]{cc:cc:cc:c}{cc:cc:cc:c}
1 & -1 & 0 & & & & 0 \\
-1 & 1 & 0 & 0 & 0 & & \\
0 & 0 & \bullet & \bullet & 0 & &\\
& 0 & \bullet & \bullet & 0 & 0 & \\
& & 0 & 0 & \bullet & \bullet & 0 \\
& & & 0 & \bullet & \bullet & 0 \\
0 & & & 0 & 0 &0 &
\end{BMAT}
\right)
\]
\end{document}
Using this example code you can easily build the second matrix.
Something like this ?
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\[
\left[
\begin{array}{c@{}c@{}c}
\left[\begin{array}{cc}
a_{11} & a_{12} \\
a_{21} & a_{22} \\
\end{array}\right] & \mathbf{0} & \mathbf{0} \\
\mathbf{0} & \left[\begin{array}{ccc}
b_{11} & b_{12} & b_{13}\\
b_{21} & b_{22} & b_{23}\\
b_{31} & b_{32} & b_{33}\\
\end{array}\right] & \mathbf{0}\\
\mathbf{0} & \mathbf{0} & \left[ \begin{array}{cc}
c_{11} & c_{12} \\
c_{21} & c_{22} \\
\end{array}\right] \\
\end{array}\right]
\]
\end{document}
Best Answer
For a good source to math symbols, I think the Comprehensive LaTeX symbol list is a complement to the very good document Mathmode.pdf. This document is interesting because it offers another organization and you can find all about mathematics.