Memorandum to some useful URLs

1. Mathematica tutorial: http://www.math.sjtu.edu.cn/mathematica%BD%CC%B3%CC/
2. Free proxy server for Tsinghua Univ., CERNET: http://proxy.ipcn.org/

On researches

Don't go out to find applications and new directions, it will come to you naturally as your current research goes deep enough.

There is only good and bad research. There is no fundamental or applied research.

There does not exist a category of science to which one can give the name applied science. There are science and the applications of science, bound together as the fruit of the tree which bears it. (Louis Pasteur)