def ifftn(x, shape=None, axes=None, overwrite_x=False):
return _raw_fftn_dispatch(x, shape, axes, overwrite_x, -<NUM_LIT:1>)<EOL>
Return inverse multi-dimensional discrete Fourier transform of
arbitrary type sequence x.

The returned array contains::

  y[j_1,..,j_d] = 1/p * sum[k_1=0..n_1-1, ..., k_d=0..n_d-1]
     x[k_1,..,k_d] * prod[i=1..d] exp(sqrt(-1)*2*pi/n_i * j_i * k_i)

where ``d = len(x.shape)``, ``n = x.shape``, and ``p = prod[i=1..d] n_i``.

For description of parameters see `fftn`.

See Also
--------
fftn : for detailed information.