As of May 4 2007 the scripts will autodetect your timezone settings. Nothing here has to be changed, but there are a few things

## Sunday, April 25, 2010

### Bell Number

$$B(n) = \sum_{k=0}^{n} S(n,k)$$

with the first five Bell numbers :
$\begin{array}{llllll} &&&&&Total\\ 1 &&&&&1 \\ 0 & 1 &&&&1\\ 0 & 1 & 1 & &&2\\ 0 & 1 & 3 & 1 & &5\\ 0 & 1 & 7 & 6 & 1&15 \end{array}$

A beautiful recurrence formula for the Bell number is
$$B(n) = \sum_{k=0}^{n-1} B(k) \cdot C(n-1,k) ,$$
for example for n=4 we get: 1* 1+ 1*3 + 2*3 + 5*1 = 15.

I now have the sixth edition of the book Discrete Mathematics and Its Applications by Kenneth Rosen.

A great book which comes with the best accompanying student website I have seen sofar for a mathematics book. It probably takes hours to just to browse through all the applets.

## Welcome to The Bridge

Mathematics: is it the fabric of MEST?
This is my voyage
My continuous mission
To uncover hidden structures
To create new theorems and proofs
To boldly go where no man has gone before

(Raumpatrouille – Die phantastischen Abenteuer des Raumschiffes Orion, colloquially aka Raumpatrouille Orion was the first German science fiction television series. Its seven episodes were broadcast by ARD beginning September 17, 1966. The series has since acquired cult status in Germany. Broadcast six years before Star Trek first aired in West Germany (in 1972), it became a huge success.)