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Really a question: Could someone tell me precisely what the ordinate and abscissa are in the three graphs shown? I have and have twice read "The Music of the Primes. Wonderful book, but I want more! I've got Edwards book; it's slow going, though so far I'm making it. I'm quite familiar with Fourier Analysis as applied to engineering and physics, but not to Number Theory. I have a Ph.D. in Applied Math, and am now retired and having fun studying the primes.

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