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Freeman Dyson's Autobiography
Freeman Dyson was a Montgomery fellow in the 1990s. He's from that same circle of the Los Alamos era theoretical physicist. Feynman developed this thing called Feynman diagrams, which was invented at first by him just to simplify doing certain calculations about quantum mechanics. Oppenheimer was not very impressed by these. But Dyson saw that, wait a second, this is more than just a useful tool. Actually, this is capturing if anything, almost a physical law of quantum dynamics. This is very powerful. So he convinced Oppenheimer, Dyson convinced Oppenheimer, you're wrong, what Feynman doing what he was doing here is important.