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3. Examples of Fourier series development
3.1 Odd and even functions
Proposition 3
Let f ∊ L 1 , a n = a n (f ) , b n = b n (f ) , c n = c n (f ).
a)If fis even, we have b n = 0
and :
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Examples of Fourier series development
Case of locally integrable square functions
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