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| My uncle's father's last word was "보증서지마라" which would be roughly translated as "Do not promise your friend that you would pay for his debts in case he fails to pay for it." Korean language has a specific term for this situation.
In Korea, if you don't have enough mortgage, an alternative way to get a loan is bringing up other persons who would pay for your debt, in case you fail to pay for it. Many Koreans promise their friends that they will pay for their friends' debts out of friendship especially since their friends assure you that it will never happen that they fail to pay for it. I don't think that this system is good. | | |
| Yesterday, I learned the relationship between the index theorem and the chiral anomaly. It was so awesome, and beautiful. | | |
| Some people claim that Albert Einstein was not a good student. However, here are counter-examples: "Yesterday, Albert got his grades, once again he was ranked first,..." (From a letter from Albert's mother Pauline Einstein to her sister Fanny Einstein, dated Aug 1st 1886, reproduced in "The Collected Papers of Albert Einstein: The early years, 1879~1902") "He did so well at his autodidactic preparations that at the beginning of October 1895, at the age of only 16 1/2, he passed the entrance examination to the Federal Polytechnical School in Zurich, with the greatest success in the mathematical and scientific subjects but deficient results in the linguistic and historical ones. Because of these gaps in his education and because of his youth, his parents were advised to hav their son attend the final year of a Swiss secondary school, but with the prospect of certain admission the following year, despite the fact that he would still be fully six months below the prescribed age." (Albert Einstein--A biographical sketch by Maja Winteler-Einstein (Albert's sister), reproduced in "The Collected Papers of Albert Einstein: The early years, 1879-1902") | | |
| Why I like physics more than philosophy: I like physics because of its mathematical beauty. To learn more about that read my xanga entry on Nov 24th 2006. Here is another quote that could signify what the mathematical beauty of physics might mean: "Every theoretical physicist who is any good knows six or seven different theoretical representations for exactly the same physics." (Richard Feynman, Nobel laureate in Physics in "The Character of Physical Law," p 168) For example, it is amazing that Heisenberg's quantum mechanics and Schrodinger's quantum mechanics are equivalent, even though they may seem very different. It's amazing that they give the same results even though the actual calculations are very different. (It was Von Neumann who proved that they were equivalent.) Another example: Feynman's quantum electrodynamics and that of Tomonaga and Schwinger's look very different but they give the same answers even though the actual calculation are very different. (It was Freeman Dyson who proved that they were equivalent.) The very fact that there are six or seven different theoretical representations mean that physics is indeed consistent. However, even though I don't really know a lot about philosophy, I guess that it may not be true for philosophy. It seems that there aren't several equivalent constructions on ideas in philosophy. You may give several different arguments for your assertions, but that doesn't mean that these several arguments are equivalent. Has it been ever proved that philosopher A's argument and philosopher B's argument are the same even though they naively look very different? | | |
| Today, I asked my TF David about quadratic divergences and renormalization group equation. He convinced me that the coupling constants don't get renormalized when there is a quadratic divergence; it only gets normalized when there is a logarithmic divergence. Wow. Why didn't any textbooks that I studied mentioned this fact? I used to be confused. | | |
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