parameters: (op, grad)
docstring: Returns grad * 2/sqrt(pi) * exp(-x**2).
docstring_summary: Returns grad * 2/sqrt(pi) * exp(-x**2).
docstring_tokens: Returns grad * 2 / sqrt ( pi ) * exp ( - x ** 2 ) .
function: def _ErfGrad(op, grad):
    """Returns grad * 2/sqrt(pi) * exp(-x**2)."""
    x = op.inputs[0]
    two_over_root_pi = constant_op.constant(2 / np.sqrt(np.pi), dtype=grad.dtype)
    with ops.control_dependencies([grad.op]):
      x = math_ops.conj(x)
      return grad * two_over_root_pi * math_ops.exp(-math_ops.square(x))
function_tokens: def _ErfGrad ( op , grad ) : x = op . inputs [ 0 ] two_over_root_pi = constant_op . constant ( 2 / np . sqrt ( np . pi ) , dtype = grad . dtype ) with ops . control_dependencies ( [ grad . op ] ) : x = math_ops . conj ( x ) return grad * two_over_root_pi * math_ops . exp ( - math_ops . square ( x ) )