-=The Visible Dave Project=-

how did u find my site?
you told me about it
friend told me about it
search engine results
typed randomly;found myself here
other
 

which seems more true?
I have a brain.
I am a brain.
 

I never forget a face, but in your case I'll be glad to make an exception.
--Groucho Marx (1890 - 1977)

\begin{bmatrix} 1 & 0 & \ldots & 0 \\ 0 & 1 & 0 & \vdots \\ \vdots & 0 & \ddots & 0\\ 0 & \ldots & 0 & 1_{n} \end{bmatrix}