# Lucid dream

Level 1: have a lucid dream

Level 2: hold the lucid dream

Level 3: un-collapse it while it is collapsing

— Me@2011.07.05

# 反白論起點 2.1

Chapter 17 (第十七章)

Great rulers are hardly known by their subjects,
Then come those the people draw near and praise,
Then those the people hold in fear,
Then those the people revile.
When one lacks trust, one finds no trust.

Reluctantly, without boasting;
Perform actions, accomplish deeds;
The people will say it happened naturally.

— Tao Te Ching (Wikisource translation)

（安：我現在的上司，就沒有這個智慧。我上司很刻意地，要下屬知道他的存在，繼而再顯示自己的存在價值。

— Me@2014.07.28

# For all, 7

Whatever you (physically or mentally) encircle, it is part of the universe, not the universe.

If you claim that what you have encircled is the whole universe, I will ask,

“How can you know?”

If you define the word “universe” as “everything“, how can you know that there are no other parts unknown to you?

— Me@2014-07-27 02:50:20 PM

# 無額外論 4.3

Onion self 6.3 | Cosmic religion 3.2

~~~~~

「除了我之外，不可有別的神。」

「除了『我』之外，不可有別的神。」

~~~~~

Who are you?

I AM.

Who are you?

I am.

~~~~~

— Me@2014-07-05 09:38:36 AM

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（CSY：無限倍。）

（CPK：哈哈！）

— Me@2014.07.23

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# LogGamma

Another way to compute the binomial coefficient when using large numbers is to recognize that

 {n \choose k} = \frac{n!}{k!\,(n-k)!} = \frac{\Gamma(n+1)}{\Gamma(k+1)\,\Gamma(n-k+1)} = \exp(\ln\Gamma(n+1)-\ln\Gamma(k+1)-\ln\Gamma(n-k+1)),

where ( \ln \Gamma(n) ) denotes the natural logarithm of the gamma function at n. It is a special function that is easily computed and is standard in some programming languages such as using log_gamma in Maxima, LogGamma in Mathematica, gammaln in MATLAB, or lgamma in R. Roundoff error may cause the returned value to not be an integer.

— Wikipedia on Binomial coefficient

2014.07.23 Wednesday ACHK

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— Me@2011.07.03

— Me@2014.07.22

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— Me@2014.07.21

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# The ultimate fate of black holes, 2

Dear @anna, yes, the electron is pretty likely to be the last “remainder” of a black hole. Before it becomes an electron, the black hole may be a W boson that decays into an electron and a neutrino. Before it was a W boson, it could have been a much more excited string state… – Lubos Motl Feb 28 ’11 at 8:18

… the conclusion that black hole microstates are continuously connected to (other) elementary particle species – there’s no qualitative difference – doesn’t really depend on specific features of string theory. It’s a general fact that strings just confirm and make more specific.

— Physics Stack Exchange

— Mar 1 ’11 at 15:20

— Lubos Motl

2014.07.21 Monday ACHK

# Discussion

Discussion is always better than argument because argument is to find out who is right but discussion is to find out what is right.

2014.07.21 Monday ACHK

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（CPK：有。）

（CPK：有呀！）

（CPK：未呀。）

（CPK, LMC：係呀…）

— Me@2014.07.20

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# The ultimate fate of black holes

Are elementary particles ultimate fate of black holes?

From the “no hair theorem” we know that black holes have only 3 characteristic external observables, mass, electric charge and angular momentum (except the possible exceptions in the higher dimensional theories). These make them very similar to elementary particles. One question naively comes to mind. Is it possible that elementary particles are ultimate nuggets of the final stages of black holes after emitting all the Hawking radiation it could?

Yes, black holes are special kinds of elementary particles. That’s how they have to be represented in every consistent quantum theory of gravity. This representation of a black hole becomes especially useful and important for small black holes – whose mass is not much larger than the Planck mass.

And indeed, a black hole evaporates, which is just a form of a decay of a heavy elementary particle, and when it becomes very light, at the end of the Hawking evaporation process, it is literally indistinguishable from a heavy elementary particle that ultimately decays into a few stable elementary particles.

However, a difference that you seem to neglect is that black holes actually carry a large entropy

 S = \frac{A}{4A_0} k_B

where A is the area of the black hole’s event horizon and ( A_0 ) is the Planck area ( A_0=\hbar G / c^3 ). The constant ( k_B ) is Boltzmann’s constant. This means that there actually exists a huge number of microstates

 N = \exp(S / k_B)

and a single black hole, with a fixed value of mass, charges, and spin, is just a macroscopic description of the ensemble of N “microstates”. In reality, the black hole carries a huge information – the world distinguishes which of the N microstates is actually present.

It is these “microstates” that are really analogous to types of elementary particles. But the number of particle species that macroscopically look like the black hole of given mass, charges, and spin is not one: instead, it is huge, approximately N.

— Physics Stack Exchange

— answered Feb 27 ’11 at 16:45

— Lubos Motl

2014.07.18 Friday ACHK

# I Am Legend

 Fair use rationale for I Am Legend No free equivalent exists that would effectively identify the article’s subject.The image does not in any way limit the ability of the copyright owners to market or sell their product.The image is only used once and is rendered in low resolution to avoid piracy.

I Am Legend is a 2007 British-American post-apocalyptic science fiction horror film directed by Francis Lawrence and starring Will Smith. It is the third feature film adaptation of Richard Matheson’s 1954 novel of the same name, following 1964’s The Last Man on Earth and 1971’s The Omega Man. Smith plays virologist Robert Neville, who is immune to a man-made virus originally created to cure cancer. He works to create a remedy while defending himself against mutants created by the virus.

— Wikipedia on I Am Legend (film)

2014.07.16 Wednesday ACHK

# 受威脅招聘法

「大甲等人」的招聘哲學是，凡是才智未高到，足以威脅到（招聘者）自己地位的應徵者，都不會考慮。換句話說，「大甲等人」只會聘請，有機會威脅到自己的應徵者。

— Me@2014.07.16

# On Keeping Your Soul, 2

Als 4 days ago

I’m happy to see that you still work on string theory. Do you intend to start publishing again?

Lubos Motl Als 3 days ago

No, I do not.

Kimmo Rouvari Lubos Motl 3 days ago

Why? (just curious) Obviously you have ideas and something to say.

Lubos Motl Kimmo Rouvari 3 days ago

I just virtually never had a real pleasure out of this process which has something like dozens of consumers in the world in average and which is laborious and demanding various formalities. This part of what I would be doing was always more or less just work and I was doing these things as a part of the package for the salary.

I am not getting the income for that, I am not a communist who would think it’s really right to do the expert work for free, so I won’t do these things. I think it’s common sense and it’s very simple.

I am sufficiently frustrated when I just report on someone’s excellent paper and the feedback is 100 times less excited than the feedback following some anti-science rant by a worthless sithead … And that’s something I may ignore because it’s just not my business.

— Lubos Motl

2014.07.15 Tuesday ACHK

# pLaY, 4

work ~ progress on your original role

play ~ progress on your imagined role

work ~ act your original role

play ~ act another role

game ~ another role

— Me@2014-07-05 11:46:54 PM

# Open Source MindOS, 2.3

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 M. C. Escher Though this image is subject to copyright, its use is covered by the U.S. fair use laws because 1. It illustrates an educational article … 2. It is a low resolution image. 3. It is not replaceable with an uncopyrighted or freely copyrighted image of comparable educational value.

「不斷修正」和「不斷創造」的後果是，雙方各自也不斷重生成，新版本的自己。二人對於對方來說，也會不斷帶來新鮮感。那樣，愛情方能長久。

— Me@2014.07.14

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# 天外救星 3C

Deus ex machina 3C

「時間旅行」、「蟲洞」、「平行宇宙」、「奇蹟」等情節，都是「天外救星」。它們的出現往往代表，該故事有著，不可修補的漏洞。

— Me@2014-07-11 04:59:55 PM

# Deus ex machina 3

Time travels, wormholes, parallel universes, miracles are all deus ex machina.

When a story’s author uses those deus ex machina, it means that the story broken, in the sense that the story has plot holes that the author cannot fix.

With time travel, the story’s time logic is given up. With wormholes, the story’s space logic is given up. With parallel universes, the story’s internal consistency is given up. With miracles, the story’s scientific consistency is given up.

— Me@2014-07-12 01:15:25 PM