Leonardo di ser Piero da Vinci (April 15, 1452 – May 2, 1519) was an Italian polymath; a scientist, mathematician, engineer, inventor, anatomist, painter, sculptor, architect, botanist, musician and writer.
— Wikipedia
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* Let no man who is not a Mathematician read the elements of my work.
— The Notebooks of Leonardo da Vinci
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2008.04.24 Thursday
I have used a whole month to do this derivation.
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But I still do not know whether it is correct or not.
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2008.04.06 Sunday
I will have my Physics exam next Saturday. There are so many formulae to manage. In order to get an A, I have to develop a photographic memory.
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2007.12.01 Saturday
Learning math and physics takes a whole lifetime.
Luckily, it’s a lot of fun…
if you have a reasonably patient attitude.
— John Baez
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2007.11.26 Monday
… and in general mathematicians tend to behave like fermions, i.e. avoid working in areas which are too trendy whereas physicists behave a lot more like bosons, which coalesce in large packs and are often over-selling their doings, an attitude which mathematicians despise.
— Advice to the beginner
— Alain Connes
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A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering.
— Disturbing the Universe
— Freeman Dyson
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2007.11.22 Thursday (c) CHK2
The most powerful method of advance
that can be suggested at present is
to employ all the resources of pure mathematics in attempts
to perfect and generalize the mathematical formalism
that forms the existing basis of theoretical physics, and
after each success in this direction, to try to interpret the
new mathematical features in terms of physical entities…
— Dirac in 1931
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2007.11.20 Tuesday CHK2
Recollections
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1994-1995: Art
1995-1997: A.Maths, Physics, Chemistry, Biology, Computer, Art
1997-1999: Pure Maths, Applied Maths, Physics
1999-2002: Philosophy, Physics
2002-2004: Robotics
2004-2005: The Lost Year
2005-2007: General Maths, Additional Maths (Teacher Edition)
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2007-2009: Physics (Reloaded) Hong Kong
2008-2013: Physics (Revolutions) Netherlands
2013-20__: CERN and LHC
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2007.02.12 2007.08.30 2007.10.19 2007.10.22 (c) CHK2
My brother is accepted to the CUHK physics talent programme.
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2007.10.15 Monday (c) CHK2
人活得長，歷練凝固成金石良言。他叫人要博學：「誰也不知道，你所學的將來發展是否有用，所以盡量要多學。」
他主張背書，學問一定要熟得不得了：「一定要閉了眼晴一看，情況都看得見，你才能有希望在這方面有重要的貢獻。」
他叫人練好招式，才能把握運氣：「科學的發展，有如波浪，有高有低，當它在頂點時，你就能跨上去，但要先得練幾套拳、幾套劍。」
「你花全部時間在數學，都只能知道一點皮毛。」我記得，這是訪問的最後一句話。
— 區家麟 2004-12-08 00:51:59
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2007.10.15 Monday CHK2
Sir Michael Atiyah said of Witten,
“Although he is definitely a physicist (as his list of publications clearly shows) his command of mathematics is rivalled by few mathematicians, and his ability to interpret physical ideas in mathematical form is quite unique. Time and again he has surprised the mathematical community by his brilliant application of physical insight leading to new and deep mathematical theorems… he has made a profound impact on contemporary mathematics. In his hands physics is once again providing a rich source of inspiration and insight in mathematics. ”
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2007.10.13 Saturday CHK2
In economics, opportunity cost is
or the most valuable forgone alternative
(or the highest-valued option forgone)
i.e. the second best alternative.
— Wikipedia, Modified by Me
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2007.10.07 Tuesday CHK2
Generator of Translation
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2007.10.06 Saturday (c) CHK2
1. It is a rare, special human trait in teachers to be able to deal with students more talented than themselves, being able to kindly and effectively transfer their life experience and body of knowledge to those more gifted.
2. László Rátz was such a teacher, with refined sense for talent that he dealt with as equals, as colleagues, as peers.
3. For instance, when he felt he could no longer provide anything more to Johnny Neumann, he requested the university professor Michael Fekete to help out and teach him.
4. Eugene Wigner was asked in the late 1970’s ‘Do you remember Rátz?’ to which he answered: ‘There he is!’ and pointed to a picture of Rátz on his office wall.
— Wikipedia
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2007.10.06 Saturday CHK2
“抽象: 抽出相象的地方” –中大教授
e.g.
…
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2007.09.29 Saturday (c) CHK2
Sound Sound Slow
尋尋覓覓
冷冷清清
淒淒慘慘戚戚
— 李清照
I look for what I miss,
I know not what it is,
I feel so sad, so drear,
So lonely without cheer.
— 許淵衝先生
So dim, so dark,
So dense, so dull,
So damp, so dank, so dead.
— 林語堂先生
Searching searching
Cold cold clear clear
Poor poor sad sad … …
— Me
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2007.09.25 Tuesday (c) CHK2
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點滴累積
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2007.09.19 Wednesday (c) CHK2
Maths 
“Mathematics is a part of physics. Physics is an experimental science, a part of natural science. Mathematics is the part of physics where experiments are cheap.
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In the middle of the twentieth century it was attempted to divide physics and mathematics. The consequences turned out to be catastrophic. Whole generations of mathematicians grew up without knowing half of their science and, of course, in total ignorance of any other sciences. ”
— On teaching mathematics, by V.I. Arnold
2007.08.26, Sunday, CHK2
2.1 Knowledge map: a Geography of Knowledge
Language Logic Symbolic Logic Mathematical Logic Mathematics Mathematical Physics Theoretical Physics Physics Experimental Physics Chemical Physics Physical Chemistry Chemistry Biochemistry Molecular Biology Biology
Language Logic Mathematics Physics Engineering
August 25, 2007, Saturday, (c) CHK2
二OO三年 秋,
教 立體微積分 (Vector Calculus) 予 大一 工程生, 反應不錯,
發現自己不是完全無用.
2007.08.24 CHK2
Chemistry wins!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A. Physical Chemistry
B. Organic Chemistry
C. Inorganic Chemistry
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1. Atoms, Molecules and Stoichiometry
2. The Electronic Structure of Atoms and the Periodic Table
3. Energetics
4. Bonding and Structure
5. Chemical Kinetics
6. Chemical Equilibrium
7. Periodic Properties of the Elements in the Periodic Table
8. The s-Block Elements
9. The p-Block Elements
10. The d-Block Elements
11. Fundamentals of Organic Chemistry
12. Chemistry of Organic Compounds
13. Chemistry in Action
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2007.08.13 CHK2
![\displaystyle{Q_{ijk} = \int_{\mathbf r} \left[ \delta_{ij} ( r^2 - 5 r_i r_j + \frac{10}{3} r_i r_j \delta_{jk} ) r_k - |\epsilon_{ijk}| 10 r_i r_j r_k \right] \rho(\mathbf r) d^3 r}](https://s0.wp.com/latex.php?latex=%5Cdisplaystyle%7BQ_%7Bijk%7D+%3D+%5Cint_%7B%5Cmathbf+r%7D+%5Cleft%5B+%5Cdelta_%7Bij%7D+%28+r%5E2+-+5+r_i+r_j+%2B+%5Cfrac%7B10%7D%7B3%7D+r_i+r_j+%5Cdelta_%7Bjk%7D+%29+r_k+-+%7C%5Cepsilon_%7Bijk%7D%7C+10+r_i+r_j+r_k+%5Cright%5D+%5Crho%28%5Cmathbf+r%29+d%5E3+r%7D&bg=ffffff&fg=333333&s=1&c=20201002)
Physics Town 
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