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Fourier Series Tolstov Book Question

by Chacabucogod
Tags: book, fourier, series, tolstov
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Chacabucogod
#1
Jul24-14, 09:06 AM
P: 42
I'm currently reading Tolstov's Fourier series and in page 58 he talks about a criterion for the completeness of a system. I've attached the pages where he talks about it. In general, I don't get how he came up with this; specifically, why does he use those limits of [itex]\epsilon[/itex] and [itex]\epsilon[/itex]/4?

-Thank you
Attached Thumbnails
Tolstov-1.jpg   Tolstov 2.jpg   Tolstov-3.jpg  
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