Add  the formula and Lec_10
update the formula
Merge branch 'master' of https://github.com/zhugejun/zhugejun.github.com

Conflicts:
	teaching/math2330.html
fix some bug
Merge branch 'master' of https://github.com/zhugejun/zhugejun.github.com
update the conflict
Merge branch 'master' of https://github.com/zhugejun/zhugejun.github.com