When I decided I was going to have to do it I realised I would have to be prepared. There was no point in going up to a Nobel Prize winner and saying the kind of thing that would make him think Sesame Street was about the right level. The problem was that it was hard to know what would be enough. Finally I decided to do Fourier analysis and Laplace transforms and Lagrangians and I would also learn the periodic table because I had been meaning to do it for a long time and I would also learn the Lyman, Balmer, Paschen and Brackett hydrogen series because of Sorabji’s early interest in
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