間時間表 3

Pure Maths 10

這段改篇自 2010 年 2 月 7 日的對話。

每次做 Pure Maths 功課時,也先用八成時間處理眼前的一份。然後,你就可以做第三步:用另外的兩成時間來慢慢「歸還」以前的功課。

30 minutes Pure Maths: Assignment 10
30 minutes Pure Maths: Assignment 10
30 minutes Pure Maths: Assignment 10
30 minutes Pure Maths: Assignment 10
__________ _________________________
30 minutes Pure Maths: Assignment 2
30 minutes Pure Maths: Assignment 2

你一定有足夠時間「歸還」所有功課,因為還有一年的時間才到真正的高考。

(LWT:不是呀。有一個問題,就是就算只做最新的一份功課,也沒有足夠的時間。那何來有時間「歸還」以前的功課呢?)

不會不夠時間的。如果不夠時間的話,個個 Pure Maths 學生也不夠時間。那就不只是你個人的問題。你的競爭對手也會不夠時間。

你不夠時間,更大的可能原因是,你根本是胡亂溫習,沒有計劃,沒有方法。如果你記住我今日教你的讀書方法,而又堅決執行的話,那你「不夠時間」的機會就很微。

— Me@2010.04.30

2010.04.30 Friday (c) All rights reserved by ACHK

Fractional calculus


Nature of the fractional derivative

An important point is that the fractional derivative at a point x is a local property only when a is an integer; in non-integer cases we cannot say that the fractional derivative at x of a function f depends only on the graph of f very near x, in the way that integer-power derivatives certainly do. Therefore it is expected that the theory involves some sort of boundary conditions, involving information on the function further out. To use a metaphor, the fractional derivative requires some peripheral vision.

— Wikipedia on Fractional calculus

2010.04.30 Friday ACHK

PhD

.

Do research in order to get a PhD is a waste of time.

[Instead, you should] Go to study a PhD because you want to know real and practical physicists

in order to do real research and real teachings.

— Me@<2008

.

.

.

2010.04.30 Friday copyright ACHK