class_docstr: Elementwise inverse hyperbolic tangent function.
code: def forward(self, inputs):
      self.retain_inputs((0,))
      (x,) = inputs
      xp = backend.get_array_module(x)
      y = xp.arctanh(x)
      return (utils.force_array(y, dtype=x.dtype),)
  
file_path: chainer/chainer/functions/math/arctanh.py
imports: from chainer import backend
  from chainer import function_node
  from chainer import utils
  from chainer.utils import type_check
label_desc: Use image node_id 2 for calling the Arctanh obj's underlying member method code with example usage: obj.forward(inputs) and returns: utils