http://charlesli.org/blog Charles Li's Blog Fri, 23 May 2008 16:04:06 +0000 http://backend.userland.com/rss092 en I haven't updated my blog for millions years. I feel like I need to write something. My friend send me the following link: youtube channel for Journal of number theory. The authors can send videos about the abstracts of their papers. For the first few videos I saw, the words on ... http://charlesli.org/blog/2008/05/23/journal-of-number-thoery-and-youtube/ O'Reilly is a computer book publisher. Most of their books have distinguished animal covers. You can access their books online through Safari books online if you have a CUHK ID. Actually you can also find Prentice Hall and Addison Wesley's books. Other publishers include Sams, Que, New Riders, Microsoft press. http://charlesli.org/blog/2008/03/02/oreilly-books-online/ Few months ago, I started to use an external hard drive as my main hard disk. The main reason is that I work between three computers. I am too lazy to bring my main notebook to my office on a daily basis. Last night, my notebook can no longer access the ... http://charlesli.org/blog/2007/11/17/crash-of-my-external-hard-disk/ Recently Langlands is awarded the Shaw prize. Here are some introductory articles to Langlands' program. Beware that the articles are by no means easy. Knowledges of algebraic number theory and modular forms are assumed. Gelbart: An elementary introduction to the Langlands program[pdf], ... http://charlesli.org/blog/2007/10/12/some-introductory-articles-of-the-langlands-program/ I was very impressed by Pewkee's service. I shipped about 200kg's stuff from Taipei to Hong Kong. They came to my house around 3pm and my stuff arrived my apartment in Hong Kong the next day at 10 am! Very efficient! It is not expensive. They charged me about 20HKD ... http://charlesli.org/blog/2007/08/05/%e5%bd%aa%e8%a8%98-pewkee-trans-worldwide-express/ Did you know that many (in fact, most) color laser printers are spying on you whenever you print a document? Though you may not have heard the news, the discovery was announced in late 2005. Manufacturers embed a pattern of tiny yellow dots on printed pages. The dots are too ... http://charlesli.org/blog/2007/08/05/your-computer-may-spy-on-you/ Lagrange's Four-square theorem asserts that every positive integers can be written as sum of four squares. It was proved by Lagrange in 1770. There are several proofs, most of them are generalizations of the proofs of Fermat's theorem on sum of two squares. Same as the case for sum of ... http://charlesli.org/blog/2007/07/26/lagranges-four-square-theorem/ Essays in the History of Lie Groups and Algebraic Groups by Armand Borel is an excellent book. Anyone studying theories of Lie Groups and Algebraic groups should find this book inspiring. http://charlesli.org/blog/2007/07/26/borels-essays-in-the-history-of-lie-groups-and-algebraic-groups/ Affordable textbook campaign by Bernard Russo in AMS notices. The article contains a link to an online linear algebra textbook: A First Course in Linear Algebra, by Robert Beezer http://charlesli.org/blog/2007/07/23/affordable-textbook-campaign/ This is a nice passage written by Fields medalist John Milnor in Growing up in the old Fine Hall, Prospects in Mathematics: Invited Talks on the Occasion of the 250th Anniversary of Princeton University . p8-p.9. ....... This talk is about the past, but perhaps I should close by saying something ... http://charlesli.org/blog/2007/07/10/milnors-philosophy-of-mathematics/