This is just a note to say that I will be holding office hours tomorrow morning (between 9:00 and 10:00 a.m. PST). Please feel to catch me on Skype with any questions you may have about Columns 1 and 2. I don't expect there will be any questions, but just in case you do have questions, please feel free to call. My Skype id is : anandaimeaim.
In the meantime, here is a talk by Benoit Mandelbrot himself.