Daily Archives: August 4, 2011

Copy Me, 3

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Cumulative concept of time, 8

Since my present-self have the memory of my younger self, my younger self is part of my present-self.   

1. What is the meaning of the “same” file?

If two files contain exactly the same data, they are the “same” file.

2. Memory is the definition of identity. 

Since I have the memory of my younger self, I am the same person as my younger self. Moreover, since I have more memory than my younger self, I am more than my younger self. My younger self is part of me.

3. If I am a book, my younger self is like the one with fewer chapters:

younger self ~ chapter 1,2,3       

older self ~ chapter 1,2,3,4,5,6

— Me@2011.07.10

— Me@2011.08.04

2011.08.04 Thursday (c) All rights reserved by ACHK

天空堤壩

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Talent at its best and character at its worst

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Lord Acton said we should judge talent at its best and character at its worst. For example, if you write one great book and ten bad ones, you still count as a great writer — or at least, a better writer than someone who wrote eleven that were merely good. Whereas if you’re a quiet, law-abiding citizen most of the time but occasionally cut someone up and bury them in your backyard, you’re a bad guy.

– Paul Graham

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才能方面，如果一個人的最高點是可以接受的話，你就可以錄用他，即使他有其他任何才能缺點；

品德方面，如果一個人的最低點是不可接受的話，你就千萬不要錄用他，即使他有其他任何品德優點。

– KinOn’s presentation, modified by Me@2010.03.06

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才能方面，一個太陽可以照亮整個天空；

品德方面，一條裂縫可以摧毀整個堤壩。

– Translation by Me@2010.03.06

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2011.08.04 Thursday (c) All rights reserved by ACHK

Category Theory | Lisp, 4

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這段改編自 2010 年 3 月 6 日的對話。

我在前晚發現，我一直在研究的兩個課題，原來在某個角度之下，是同一樣東西。

（安：哪兩樣東西呢？）

一個就是 Paul Graham 強烈推介的 Lisp programming language（Lisp 編程語言）。另一個就是 John Baez 強烈推介的 Category Theory（範疇論）。

利用「範疇論」，我們可以將「相對論」的數學語言和「量子力學」的數學語言，統一成一套數學語言。留意，我不是指統一「相對論」和「量子力學」本身，而是指統一它們的數學語言。「相對論」所用的數學語言是 differential geometry（微分幾何）。「量子力學」所用的數學語言是 representation theory（表示論）。

Lisp 和「範疇論」都是我幾年前就開始關心的課題。最近才發現，它們竟然是「同一樣」東西，令我十分驚奇。幾天前，我還正正考慮著，好不好暫時放棄其中一門，因為我沒有時間同時深入研究 Lisp 和「範疇論」。現在，問題突然消失。

彷彿是同時愛上了兩位女仕，最終要二擇其一。正當面臨痛苦決擇之際，發現她們，竟然是同一個人。

— Me@2011.08.03

2011.08.03 Thursday (c) All rights reserved by ACHK