方程

斷言兩個表達式相等的數學陳述
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  • 方程式对我更重要,因为政治只看眼前,而方程式是永恒的。
    原文:Equations are more important to me, because politics is for the present, but an equation is something for eternity.
    ——愛因斯坦
  • 狄拉克的學生約翰·波羅金侯恩曾回憶道:「有次他被問到對於物理的核心信念,他走向黑板並寫下『自然的法則應該用優美的方程式去描述』」[1]
  • 狄拉克經常談到應該優先尋找美麗的方程式,而不要煩惱其物理意義。史蒂文·溫伯格對此曾有評論:
  • 费曼很欣赏[3]量子电动力学的先驱狄拉克,费曼有一部分工作也是建立在狄拉克早年成果之上的。[4]费曼一直很想找狄拉克专门讨教问题,但是狄拉克是一个沉默寡言出了名的人,很难打开话匣子。为此,费曼不止一次找话题和狄拉克套近乎,但多数情况都吃了闭门羹。[4]平时口若悬河的费曼对惜字如金的狄拉克几乎无计可施。[4]据说狄拉克有一次见到费曼时,直接用了一句“我有一个方程(指狄拉克方程),你有吗?”打发了他。[5]

参考文献 编辑

  1. John Polkinghorne. 'Belief in God in an Age of Science' p. 2.
  2. Farmelo 2009,第428页
  3. Feynman&Weinberg 1987,第1页 (位于第1章第1页)。摘录相关文字如下:“到这里来我感到非常荣幸。我应该接受这个邀请,毕竟他始终都是我心目中的英雄,而且我自己能来这儿作纪念他的报告是一件再好不过的事。”
  4. 4.0 4.1 4.2 Physicist Paul Dirac Is 'The Strangest Man'. The Rakyat Post. 2009年10月4日 [2016年10月2日] (英语). Dr. FARMELO: 'I mean, as I said, people like, you know, Richard Feynman and - these have gone on the records saying he was their hero. He was the person they looked up to.'","Dr. FARMELO: 'Yeah. Well, I think the picture you're talking about is - was taken in Poland. And that was one of the times where Feynman tried to pin Dirac down, something he often wanted to do, because as I said earlier, Dirac was a hero to Feynman. Feynman was working on a theory in photons, electrons, building on Dirac's great work in the mid-1920s. But he found as he - Feynman often said to friends - extremely difficult to get anything out of Dirac. He was a person of such - he was so inward, so to speak...' FLATOW: 'Yeah.' Dr. FARMELO: '...so unwilling to open up that Feynman found it virtually hopeless.' 
  5. Koh Aik Khoon. Dirac vs Feynman: Two different physicists. 2014年11月11日 [2016年10月1日] (英语). Dirac asked Feynman point blank: “I have an equation, do you have one, too?”