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I've heard a lot about this number $e$. Why is it so important? How does it fit into the 'bigger picture' of mathematics? How is it calculated and used?

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    (Very) related: http://math.stackexchange.com/questions/30062010-08-26
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    Read this very, very good and accessible book!
    http://books.google.com/books?id=eIsyLD_bDKkC&printsec=frontcover
    2010-08-26

9 Answers 9