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芳华

Macbook Air

Air, unwrapped.
Thin, light, durable. Thank you, flash storage.
Air over Book

Hooray! Finally, I don’t have to bear the spinning wait cursor anymore.

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Mathematics

How to say maths terms in English?

On Maths Presentation Workshop at Carnegie Mellon University, Professor Brandon was trying to to help us understand the undergrad in United States and improve our teaching skills. This was my first time knowing how to say maths terms in English. And I want to share with you some of the tips. Before I start, I would like to abbreviate some of the points that Prof. Brandon mentioned concerning teaching.

  • Lousy background. American students have a lousy background in mathematics, but it doesn’t mean they are not smart. You will see students writing \frac{1}{a}+\frac{1}{b}=\frac{1}{a+b} or \sqrt{a}+\sqrt{b}=\sqrt{a+b}, but it’s not their fault. Even their high school teachers would say ‘Well, it’s just a different way to do those calculations.’
  • Cheat on homework. A student who is copied by others is considered cheating as much as the student who copied him or her.
  • Handholding. Some students do not know how to learn things. They need someone to guide them, for instance, how to use textbooks, how to prepare exams, etc.
  • 2 tips on teaching skills. Keep eye contact. Reword things and write it down.

Finally, here is the list that gives you some examples of spoken Maths.

Maths Terms How to say it?
\frac{1}{x^n} 1 over x to the power of n
\sqrt[3]{x}, \sqrt[4]{x} cube root of x, fourth root of x
\sin^{n}x sine to the power of n of x
f\circ g f composed with g
\lim_{x\rightarrow a}f(g(x)) limit as x approaches a of f of g of x
x\rightarrow \pi^{-} x approaches pi from the left
\frac{d}{dx}f(x) the derivative of f of x (with respect to x) or d over dx of f of x
\frac{\partial x}{\partial y} del y over del x
\nabla, \Delta gradient, Laplacian
\log_a(xy) log (with respect to) base a of x times y
\ln x natural log of x or ln of x
f(x)g(x)]_a^b f of x times g of x evaluated from a to b
f(x,y), (a,b) f of x comma y, a comma b
f'(x), f^{\prime\prime}(x), f^{\prime\prime\prime}(x) f prime of x, f double prime of x, f triple prime of x
S_n, \cdots, f_x s sub n, dot dot dot or etc, f sub x
Categories
芳华

我很好,美国还行

之前总是找不到一个时间,既有相机在身边,又有网络。今天,伟大且万能的室友在 Verizon 大罢工期间,居然把网络给开通了,还是 FiOS 的哦~

先报平安,具体么,各种顺利啦。

去之前,房子莫名其妙就搞定了,室友很友善。去之前还在考虑家具的事情,结果原来住在那附近的小朋友要走,东西想变卖了:床,席梦思,桌子,台灯,四样打包 120 美元,还挺便宜,并且还帮忙搬到我住的房间了。并且更过分的是,去了之后,桌子前面莫名其妙多了一个非常舒服的椅子,室友都无法解释为什么那个椅子会出现在那里。

于是我就这样,过去,铺好床,开始睡觉了。

据说,这叫做窃取革命胜利果实。

从多伦多转机的飞机,邻座是位交大美眉,当时有种似曾相识的感觉。昨天才反应过来,原来长得像章子怡啊。来接机的学长的车是装不下两个人的行李的,但机场把她行李弄丢了一个,就正好了。汗。

补充一句,这里复旦和交大的人真多,每天认识一组。

睡醒的第一个早晨,室友就很好心地带我去开了银行和手机,还给我来了个 Campus Tour。虽然有点不习惯这样被带着走,但还是很感谢室友的热情的。

去系里报道,原来“小秘”是位和蔼的老太太。但记忆力惊人,居然见到我就报出了我的名字,还能背我的 email 地址,我被吓到了。领了办公室的钥匙之后,我就去自己办公室转了一圈,正好碰到办公室的室友,是哥伦比亚人,也超级友善的。

然后就是各种 Orientation,各种酱油,各种资料,各种排队,各种吃喝。比如在 Graduate Student Assembly 的忽悠下在 Walnut Street 上排了两个小时,得到了一个免费的 Gelato。今天中午在大太阳下面排了一个小时,一顿免费的 BBQ。

打算在开学的时候先考掉一门资格考试,所以又要开始学术啦。

办公室那层楼有一个巨舒服的研究生自习室,改日发照片。

过几天还有助教的考试,不知道能不能通过。管它呢,反正我是外国人,说不好英语正常的。据说明天的 Workshop 是帮助我们过那个考试的。

哦,忘记说了,这里东西都真心难吃。每次吃饱的时候,我才反应过来他们是多么的难吃。当然,这么说是夸张了。

附一个我“做”的菜。我清晰记得这道菜的做法:打开包装袋,放进微波炉,转三分钟,拿出来,对着土豆泥搅一搅,放回去,转一分半,就好啦。

Baked chicken.

怎么听着有点像纸包鸡呢?