Trigonometric Series

A trigonometric series is a series of the form:

It is called a Fourier series if the terms and have the form:

where is an integrable function.

Read more about Trigonometric Series:  The Zeros of A Trigonometric Series, Zygmund's Book

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    Every man sees in his relatives, and especially in his cousins, a series of grotesque caricatures of himself.
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