His time of active service was not wasted as far as research was concerned, however, for he continued his theoretical work, submitting another paper from his position on the Italian front.
— MacTutor History of Mathematics
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2007.05.06 CHK2
Author Archives: rpflee
Alfred Tarski
Along with Aristotle, Gottlob Frege, and Kurt Godel, Tarski is generally considered one of the four greatest logicians of all time (Vaught 1986). Of these four, he was the best mathematician and the most prolific author.
…
Hence between 1923 and his departure for the United States in 1939, Tarski not only wrote several textbooks and many papers, a number of them ground-breaking, but did so while supporting himself primarily by teaching high-school mathematics.
— Wikipedia
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2007.05.04 CHK2
physics in itself
I breathe Physics.
–Me
2007.05.02
Mind
The mind is its own place, and in itself can make a heaven of hell, a hell of heaven.
— John Milton, Paradise Lost
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2007.05.02 CHK2
遠方
仍然在遠方 追我夢與想
—潘源良
放手
把手緊握 什麼都沒有
把手放開 你得到一切
–臥虎藏龍
2007.04.15
凡
凡望成仙
仙亦思凡
行雲流水
隨遇而安
–李天命
2007.04.07
似水流年
隨時間走過……
……你變了幾多?
— 李克勤 白紙鶴
2007.03.17
E1
Do not be too timid
and squeamish about your actions.
All life is an experiment.
The more experiments
you make the better.
— Emerson
2007.03.16
Rare
How would it be possible,
if salvation were ready to our hand,
and could without great labour be found,
that should be by almost all men neglected?
But all excellent things are as difficult as they are rare.
— Spinoza
Sándor Petőfi
樹上有櫻桃千百顆
我卻只有一個老婆
就是一個已嫌太多
她早晚會氣死我
— 裴多菲
If
If you love someone,
Set her free…
If she comes back, she’s yours,
If she doesn’t, she never was….
–anon
惜此際
青風難洗舊情濃，問誰山下獨追憶。故人猶如江水逝，歲月無情不留痕。但願山下有情郎，活在當下莫愁容。昔日逝，明日來，時光驟似光來回。把酒談，惜此際，一日難處一日當。莫為昔日未來愁。仰天看，落霞紅，明日愁來明日憂。
— 佚名
A Beautiful Mind
“It’s the same with your dreams and nightmares. You have to feed them to keep them alive.”
Antoine de Saint-Exupéry
“Perfection is achieved not when there is nothing more to add,
but when there is nothing more to take away.”
Random walk
Whenever I am bored, I
1. go to Wikipedia;
2. go to the Physics page;
3. read;
4. select another page linked by the page through the hyperlinking words;
5. read;
6. go to step 4.
Robotics
This page is for notes and tips on Robotics.
Physics Town 