# Mac OS X下MATLAB R2012b安装及破解

http://blog.sina.com.cn/s/blog_559d66460101caur.html

## Mac OS X下MATLAB R2012b安装及破解 (Updated on 10/19/2013)

(2013-03-08 05:28:16)

【转载请注明出处！！！】

1. 下载 MATLAB R2012b 安装包。安装文件的大小约为5G。之前的下载地址都失效了，为了方便大家，po主自己传了一份到百度网盘。因为度娘不允许单个文件大于4G，所以压成了5 parts，请把5 parts都下完后再解压… 侵删，勿跨省跨国追捕…

Part 1: http://pan.baidu.com/s/15lLMe    提取密码：ygxm
Part 2: http://pan.baidu.com/s/1dFl4    提取密码：naxi
Part 3: http://pan.baidu.com/s/19V4cW    提取密码：zrwu

Part 4: http://pan.baidu.com/s/1FvjiY    提取密码：ag8t
Part 5: http://pan.baidu.com/s/1899jD    提取密码：f85x
PS：大家随便下，po主不设权限不收钱，不用谢，作为交换请不要关掉页面的background music，让po主私心promote一下G-Dragon的音乐  各种风格都有，歌曲排序大概是普通青年->文艺青年->黑泡青年，请根据喜好自行切换

2. 下载 MATLAB R2012b 安装密钥/License。地址：http://vdisk.weibo.com/s/sSDYb （微博快被@爆了… 改天传一份到度娘去…）。解压后安置在某处待用。
3. 双击MATLAB安装文件(.iso file)，选择 Install for Mac。进入以下画面时，点选 Install without using the Internet （离线安装），然后点击Next

4. 在这一步中选择 I have the File Installation Key for my license。在前面下载并解压的安装密钥文件夹中，打开文件“MatLab R2012b 安装密钥.txt”，复制任意一个密钥，粘贴到输入框中。据说不同长度的license代表所含的组件数量不一样。点击Next

5. 在这一步中，根据自己的需要，选择安装类型。普通用户的话选Typical即可，高端用户可选择自定义安装Custom。然后Next

7. 之后就开始安装了。Enjoy the free MATLAB on your Mac!
【Update】其它问题：
(1) A server line could not be found in your license file. You will have to manually edit the SERVER line in /Applications/MATLAB_R2012b.app/licenses/network.lic
PS：这个解决方法来自[2]。因为我之前已经装了Xcode，虽然没有特别去设置什么，但没有碰到这个问题。有这个问题的小伙伴们如果没有装Xcode，就先装Xcode，还是有问题的话就装下面这个patch。

Notes for the Mac Platform
A patch is required to add support for Xcode 4.6, 4.5, 4.4 and 4.3. See Solution 1-FR6LXJ for the patch and installation instructions.

References:
[2] http://blog.sina.com.cn/s/blog_c29649af0101f5g4.html
[3] http://www.mathworks.co.uk/support/solutions/en/data/1-FR6LXJ/

# Controversy over Yau-Tian-Donaldson

http://www.math.columbia.edu/~woit/wordpress/?p=6430

# Controversy over Yau-Tian-Donaldson

Posted on November 25, 2013 by woit

The last posting here was about an unusually collaborative effort among mathematicians, whereas this one is about the opposite, an unusually contentious situation surrounding important recent mathematical progress.

What’s at issue is the proof of what has become known as the “Yau-Tian-Donaldson” conjecture, which describes when compact Kähler manifolds with positive first Chern class have a Kähler-Einstein metric. This is analogous to the Calabi conjecture, which deals with the case of vanishing first Chern class. Progress by Donaldson on this was first mentioned on this blog here (based on his talk at Atiyah’s 80th birthday conference in 2009). Last fall a proof of the conjecture was announced by Chen-Donaldson-Sun, with an independent claim for a proof by Gang Tian, see here. I wrote a bit about this last winter here, after the details appeared of the Chen-Donaldson-Sun proof, and that posting gives some links to expository articles about the subject.

I had heard that there were complaints about Tian’s behavior in this story, including claims that he did not have a complete proof of the conjecture and was not acknowledging his use of ideas from Chen-Donaldson-Sun. Recently this controversy has become public, with Chen-Donaldson-Sun deciding to put out a document (linked to from Donaldson’s website) that challenges Tian’s claims to have an independent proof. The introduction includes:

Gang Tian has made claims to credit for these results. The purpose of this document is to rebut these claims on the grounds of originality, priority and correctness of the mathematical arguments. We acknowledge Tian’s many contributions to this field in the past and, partly for this reason, we have avoided raising our objections publicly over the last 15 months, but it seems now that this is the course we have to take in order to document the facts. In addition, this seems to us the responsible action to take and one we owe to our colleagues, especially those affected by these developments.

I should make it clear I’m no expert on this mathematics, so ill-equipped to judge many of the technical claims being made. The Chen-Donaldson-Sun document is giving one side of a complicated story, so it would be useful to have Tian’s side for comparison, but I have no idea if he intends to respond.

On a more positive note, perhaps this controversy will not interfere much with future progress in this area, as Donaldson and Tian are jointly organizing a Spring 2016 workshop on this topic at MSRI.

Update
: I hear from Tian that he has recently written a response to the Chen-Donaldson-Sun document, which is available here, and he may at some point write some more about this. Anyone who has read the CDS side of this should also take a look at what Tian has to say in response.

# 离散数学第一讲：集合论的创立和第三次数学危机

－－Cantor

$X=\{ x_{0}, x_{1},...\} \text{ and } \mathbb{N}=\{0,1,2,...\}.$

$|X|=|\mathbb{N}|=\aleph_{0}.$

$2\mathbb{N}=\{ 0,2,4,6,...\}, |2\mathbb{N}|=\aleph_{0}$

$\mathbb{Z}=\{...,-1,0,1,...\}$ is countable. The set $\mathbb{Q}$ is countable.

$\mathbb{N}\times \mathbb{N}$ is also countable.

$f(x)=\sum_{i=0}^{n} a_{i} x^{i}, (a_{i} \in \mathbb{Z}, a_{n}\neq 0)$

$h(f(x))$小的先数。因此整系数多项式是可数的。

# [转]DJVU格式电子图书介绍

———————-

djvu是一种电子文档格式，于1996年被美国AT&T实验室研制成功。与我们熟悉的pdf、ppt等一样，djvu文件中存储了文字、图片等信息，可通过软件进行此类文档的制作、分享、阅读操作。

djvu的技术特色，即为什么要选择djvu？

djvu没有ppt与pdf，甚至没有pdg更大众化，但是它的技术特点确是其先天优势，具体来讲有以下几点：

1.双层打印

2.超级强大的压缩功能

3.适合网络分享

DJVU阅读器：WinDjView 0.4.1 下载

View original post

# 转载：世界十个著名悖论的最终解答

（一）电车难题（The Trolley Problem）

Das曰：

Das这样驳斥这种观点：

Das曰：

Das认为：

Das来讲一个现实生活中的真实的故事：

A显然对这种威胁不屑一顾：“我真的不知道你问什么。”

A这一次没有回答。

Das曰：

Das曰：

das曰：

Das曰：

“中文房间”最早由美国哲学家John Searle于20世纪80年代初提出。这个实验要求你想象一位只说英语的人身处一个房间之中，这间房间除了门上有一个小窗口以外，全部都是封闭的。他随身带着一本写有中文翻译程序的书。房间里还有足够的稿纸、铅笔和橱柜。写着中文的纸片通过小窗口被送入房间中。根据Searle，房间中的人可以使用他的书来翻译这些文字并用中文回复。虽然他完全不会中文，Searle认为通过这个过程，房间里的人可以让任何房间外的人以为他会说流利的中文。

Searle创造了“中文房间”思想实验来反驳电脑和其他人工智能能够真正思考的观点。房间里的人不会说中文；他不能够用中文思考。但因为他拥有某些特定的工具，他甚至可以让以中文为母语的人以为他能流利的说中文。根据Searle，电脑就是这样工作的。它们无法真正的理解接收到的信息，但它们可以运行一个程序，处理信息，然后给出一个智能的印象。

“中文房间”问题足够著名，这是塞尔为了反击图灵设计的一个思想实验。

“我不知道。”

Das曰：除非你脑袋里头首先有必要的相关知识、概念，并且能够使用这些知识、概念对感觉到的事实、现象、真理进行分类整理、分析判断，得出相应的结论，否则你不可能“知道”任何东西。

Das在很多帖子里多次谈到薛定谔的猫，这个悖论的重要性不言而喻。薛定谔的猫和麦克斯韦的妖并列为科学史上的两大奇观。不同的是麦克斯韦的妖是一个已经解决的问题，薛定谔的猫至今仍悬而未决。有人说薛定谔猫态在介观尺度早已实现了，有人说哥本哈根解释早已崩溃了，公说公有理，婆说婆有理。很多人不愿意介入这场争论——尽管这是现阶段人类面临的最为重要的问题——不是他们不感兴趣，而是他们根本不愿意花费数年的生命去搞清楚量子力学的基本原理。
Das曾经立志要让毫不懂得量子力学的人在二十分钟之内了解薛定谔的猫，可是我失败了。失败了不要紧，我们从头再来。这一次das不再用现实世界中的例子来比喻，而是用一个如假包换的量子力学的真实事例来说明：

“反对称”是什么意思？

“纠缠态”、“叠加态”真的存在吗？或者仅仅是数学对我们不了解的原因给与了近似的描述？

10．缸中的大脑（Brain in a Vat）