Desultory essay

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Desultory essay

前两天偶然间点进了一个页面，MIT 的一次课（全英版）:背包问题，动态规划简介;

调试及一些classical mistakes：

Dynamic Programming 

1.reversed order of arguments(自变量顺序错误)

2.Spelling (拼写错误）

3.Initialization(初始化）

4.Objective versus value equality(对象与值相等）

5.Aliasing(别名混淆）

（deep versus shallow copy）

6.Side effects

7.Keep record of what you tried

8.Reconsidering assumpation

These are some fragmentary knowledge points（jottings） that I writed down. 

    Now I have been trying to write something in English in order to improve my writing,meanwhile,it's beneficial for me to read some original books about my major(Mathematics) and something that I'm interested,such as Little Prince,The Great Geatsby,Mathematical Analysis,and some books about Programming and so on.

    In fact,now I even don't know what I really want and what I really like.In my spare time,I like watch some little videos about universe;some movies especially American sicence fiction;some mathematical puzzles all over the world;(the day before yesterday,I see a question by chance on the internet about mathematics,it is one of The seven Mysteries of the Millennium(千禧年七大难题：NP完全问题，霍奇猜想，庞加莱猜想，黎曼假设，杨-米尔斯存在性和质量缺口，纳卫尔-斯托可方程的存在性与光滑性，BSD猜想）and so on.Its general idea is to prove P=NP,if you can prove it ,that is to say,you'll be paid for $1000000 (It sounds cool but so difficult.) by Clay Mathematics Institute.However,from my perspective,I think it do more harm than good,because if P=NP were proved,the possibility of a password cracking attack will increase,even every password can be cracked,though it also can bring something convenient to the world.( I have a "daydream":to finish the prove of P=NP,then  I can get $1000000.)

   Every time I stay up to do something about study,I am so happy that I have done something makes me feel a sense of achievement,that feeling is so cool,hope that I can keep it.some days ago ,I read a title called Invest Yourself,that is an motivational English video ,it motivatied me in some degree.

   After getting in touch with some other universities,I found that there are a lot "lot" of new things waiting for me,and I am also trying my best to broad my horizon,to learn more,and learn well now. Divide a target into many little targets and step by step do it,even a minute. 

  That's all that I want to express.