add mathematics books and contributor info

Author: elder-frog

README.md

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 	- 机器学习：实用案例解析 (O'Reilly精品图书系
 
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+- [数学](https://mega.nz/#F!LQJGQZgZ!DTSHGKRas-XDEOHYavpghw):
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+    - Mathematical Analysis I by Vladimir A. Zorich
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+    - Mathematical Analysis II by Vladimir A. Zorich
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+    - Thomas' Calculus by George B. Thomas
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+    - 普林斯顿微积分读本 by Adrian Banner
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+    - Linear Algebra and Its Applications by Gilbert Strang
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+    - The matrix cookbook by Kaare Brandt Petersen & Michael Syskind Pedersen
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+    - Probability: Theory and Examples by Rick Durrett
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+    - Probabilistic Graphical Models: Principles and Techniques by Daphne Koller & Nir Friedman
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+    - Functional Analysis by Walter Rudin
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+    - Functional Analysis, Sobolev Spaces and Partial Differential Equations by Haim Brezis
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+    - Linear and Nonlinear Functional Analysis with Applications by Philippe G. Ciarlet
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+    - Convex Optimization by Stephen Boyd & Lieven Vandenberghe
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+    - Graph Theory by Reinhard Diestel
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+    - Graph Theory by J.A. Bondy & U.S.R. Murty
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+    - Mathematics for Computer Science by Eric Lehman & F Thomson Leighton & Alber R Meyer
 
 - [Packt每日限免电子书精选](http://ddl.escience.cn/f/IS4a):
 
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contributors.md

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 | [Youjie Xia](https://youjiexia.github.io) | 上海交通大学 |
 | [Jiapeng Zhang](https://www.zhihu.com/people/jiapengzhang) | 三本大学生 |
 | [Zhigang He](https://github.com/Hochikong) | 暨南大学 |
+| [Wenhan Wu](https://github.com/wwh2259253) | 三本菜鸡 |
 
 
 
@@ -30,3 +31,5 @@
 
 
 
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