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Some time ago I came upon a recommendation letter written by a professor of mathematics and physics at Carnegie Mellon for John Nash, who was applying for admission to Princeton for grad school. Nash, of course, went on to win a Nobel prize and is the subject of the movie A Beautiful Mind, which you may have seen. His invention of what is now called the Nash Equilibrium is one of the foundational concepts of game theoretic economics. Anyway, here is the letter:
