内容有：
- ID3
- C4.5
在底下这个github里面哦
https://github.com/baibizhe/csc311/blob/master/course%20note/decision%20tree/decition%20tree%20(ID3%20nad%20C4.5).pdf
底下是有关information theroy 和KL-divergence
内容有： - More mutual information and independence
- Kullback-Leibler divergence
- Gibb’s Inequality
在底下这个链接里面，CMU写的
http://www.cs.cmu.edu/~venkatg/teaching/ITCS-spr2013/notes/lect-jan22.pdf