# band diagonal Matrix

How can I represent this matrix in latex ?

• Just as any other matrix with \begin{bmatrix} ... \end{bmatrix}. For the braces this might be helpful: tex.stackexchange.com/questions/130798/braces-over-matrix – Henri Menke Mar 14 '17 at 10:03
• You'll get better help if you explain what you have got so far, and what specifically you are trying to achieve. – Seamus Mar 14 '17 at 10:29
• Do you need the matrix for fixed n and k or do you need exactly what is shown on your drawing? – Fabian Pijcke Mar 15 '17 at 16:43

You might find this useful. As for adding a big 0, you can overlay with \smash and \rlap (or use a tikzpicture).

\documentclass{article}
\usepackage{mathtools}

%from page 117 of symbols.pdf
\makeatletter
\def\revddots{\mathinner{\mkern1mu\raise\p@
\vbox{\kern7\p@\hbox{.}}\mkern2mu
\raise4\p@\hbox{.}\mkern2mu\raise7\p@\hbox{.}\mkern1mu}}
\makeatother

\begin{document}
$$\begin{bmatrix} 0 & \cdots & 1\\ \vdots & \revddots & \vdots\\ 1 & \cdots & 0 \end{bmatrix}$$
\end{document}