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# scipy.fftpack.itilbert

`scipy.fftpack.``itilbert`(x, h, period=None, _cache={})

  Return inverse h-Tilbert 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)*tanh(j*h*2*pi/period) * x_j
      y_0 = 0

  For more details, see `tilbert`.