def METHOD_NAME(circulant_operator):
  # Inverting the spectrum is sufficient to get the inverse.
  return linear_operator_circulant.LinearOperatorCirculant(
      spectrum=1. / circulant_operator.spectrum,
      is_non_singular=circulant_operator.is_non_singular,
      is_self_adjoint=circulant_operator.is_self_adjoint,
      is_positive_definite=circulant_operator.is_positive_definite,
      is_square=True)