
{{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
    -------
    y: number
        Hyperbolic arccosine (in radians).

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

    See Also
    --------



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

    If `x < 1`, the function returns `NaN`.

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

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

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

    See Also
    --------


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