DLMF:1.8.E4 (Q257)

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DLMF:1.8.E4
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    Defining formula
    c n = 1 2 ⁢ π ⁢ ∫ - π π f ⁢ ( x ) ⁢ e - i ⁢ n ⁢ x ⁢ d x . subscript 𝑐 𝑛 1 2 𝜋 subscript superscript 𝜋 𝜋 𝑓 𝑥 superscript 𝑒 𝑖 𝑛 𝑥 𝑥 {\displaystyle{\displaystyle c_{n}=\frac{1}{2\pi}\int^{\pi}_{-\pi}f(x)e^{-inx}% \mathrm{d}x.}}
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    DLMF id
    DLMF:1.8.E4
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