Knee Play 5 (live) – Einstein on the Beach by Philip Glass
Published on YouTube by Jonathan Pillow
Published on Nov 1, 2012
Recorded live at The Green Space in NYC
(prior to recent revival of Einstein on the Beach at Brooklyn Academy of Music):
PHILIP GLASS: AN HOUR WITH EINSTEIN
Saturday, September 8, 2012 3:00 PM
http://www.thegreenespace.org/events/…
RECURSIVE 
hi, thanks for posting that piece of music.
if you are interested in numbers and systems you might find interesting this book here:
http://books.google.com.cy/books?id=_d7u3Nis52MC&printsec=frontcover&dq=number+and+time+von+franz&hl=en&sa=X&ei=fWO6U_7ANrOp7AaClIDACQ&redir_esc=y#v=snippet&q=neun&f=false
the above link directs you to page 115 where von franz is discussing about what nine signifies according to her sources, among other things.
Thank you Ioannis for your comment and a very interesting link. I’m glad you liked that little bit of ‘Einstein on the Beach’ by Philip Glass. Numbers are fascinating, especially when one looks at their own particular qualities, as Number and Time does. This looks like a very interesting book, thanks very much for sharing it.