-=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
 

this website would be better without ads?!
yes, i'd login and identify myself.
yes, just cause - everything should be free.
no
don't care
 

If you can't explain it simply, you don't understand it well enough.
--Albert Einstein

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