Saturday, December 27, 2008

Spectral clustering video tutorials

This video is especially good. (I've had some problems with the video in the past--but today it was available and I was able to view all 50 mins of it with Linux/Flash media player.)

But first, you might be interested in viewing this set of 4 videos by Ulrike von Luxburg. They provide an introduction both for the concepts and the terminology.

Monday, December 22, 2008

Go west young man

Ramanujan, had he lived long enough, would have been 121 today. Ramanujan's recognition--I think I read this in The Man who knew Infinity--encouraged other Indian scientists and mathematicians to cross the black water, venture abroad and make their mark in the global--or perhaps that should be the western--theatre.

And the trickle became a steady stream, that flows from high ground to low, compelled by the inevitable tug of lucre. A young man I once knew, had similarly navigated his way downstream. One day he revealed what I had started suspecting, that he was indeed a close relative of the great Ramanujan. He was unnaturally gifted at math. But that was then. Now, I suspect, he has only the lucre.

Thursday, December 18, 2008

Spectral graph theory resources

Fan Chung, the author of the oft-cited text Spectral Graph Theory has posted, among other things, a series of lecture notes on the subject. I'm posting this specific link for quick reference--it's otherwise hard to find in the maze of content on her site.

I read the book on Erdos some years ago. Featured too were two mathematicians, a juggler and his Taiwanese-born wife. The wife, I believe, was Fan Chung.

Friday, December 12, 2008

Deaf and mute

There is a list somewhere--10,001 things to experience before you die. I have to say, a head cold was not on the list. But now that I've succumbed, and it looks like I might just triumph, I'll add that to that list. The idea is to have a full range of experiences ...