{{alias}}( x )
    Computes the inverse hyperbolic cotangent of a number.

    The domain of the inverse hyperbolic cotangent is the union of the intervals
    (-inf,-1] and [1,inf).

    If provided a value on the open interval (-1,1), the function returns `NaN`.

    Parameters
    ----------
    x: number
        Input value.

    Returns
    -------
    y: number
        Inverse hyperbolic cotangent (in radians).

    Examples
    --------
    > var y = {{alias}}( 2.0 )
    ~0.5493
    > y = {{alias}}( 0.0 )
    NaN
    > y = {{alias}}( 0.5 )
    NaN
    > y = {{alias}}( 1.0 )
    Infinity
    > y = {{alias}}( NaN )
    NaN

    See Also
    --------