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hijiklmn
第？章　electromagnetism implies the relativity theorie!

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"I met Stan Ulam in 1964", at a lecture I was giving in New York. Kac had prevailed on his reluctance to sit for an hour in front of anything but a coffee table in a sidewalk café. After twenty minutes he remembered "an urgent appointment downtown" and walked out. Years later I was to learn that ten, not twenty minutes is his normal limit for a lecture. Once the idea has come across, he reasons, it is more fun to work out the details by yourself; and if the main idea has not been put forward in the first ten miutes, then the lecture is probably not worth your time.

#ref error ：画像を取得できませんでした。しばらく時間を置いてから再度お試しください。

This one-shot quality of Ulam's thought became more apparent after I arrived in Los Alamos. "Any good idea can be stated in fifty words or less," he pronounced with a twinge of challenge in his voice. I am probably the only student of physics to be taught in twenty-word sentences unevenly spaced throughout the working day, and at later dinner parties, each one an irritatingly clear summary of one or more chapters of the Handbuch der Physik.