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# scipy.fftpack.ihilbert

`scipy.fftpack.``ihilbert`(x)

  Return inverse Hilbert transform of a periodic sequence x.

  If `x_j` and `y_j` are Fourier coefficients of periodic functions x and y, respectively, then:

      y_j = -sqrt(-1)*sign(j) * x_j
      y_0 = 0

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