In the margins of his revision copy of Numerical Prediction, Lewis Fry Richardson wrote, Einstein has somewhere remarked that he was guided towards his discoveries by the notion that the important laws of physics were really simple. R.H. Fowler has been heard to remark that, of two formulae, the more elegant is the more likely to be true. Dirac sought an explanation alternative to that of spin in the electron because he felt that Nature could not have arranged it in so complicated a way. These mathematicians have been brilliantly successful in dealing with mass-points and point-charges. If
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