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

    The domain of `x` is restricted to `[1,+infinity)`. If `x < 1`, the function
    will return `NaN`.

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

    Returns
    -------
    out: number
        Hyperbolic arccosine (in radians).

    Examples
    --------
    > var v = {{alias}}( 1.0 )
    0.0
    > v = {{alias}}( 2.0 )
    ~1.317
    > v = {{alias}}( NaN )
    NaN

    // The function overflows for large `x`:
    > v = {{alias}}( 1.0e308 )
    Infinity

    See Also
    --------

