{{alias}}( x, y )
    Computes the natural logarithm of `exp(x) + exp(y)`.

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

    y: number
        Input value.

    Returns
    -------
    v: number
        Function value.

    Examples
    --------
    > var v = {{alias}}( 90.0, 90.0 )
    ~90.6931
    > v = {{alias}}( -20.0, 90.0 )
    90.0
    > v = {{alias}}( 0.0, -100.0 )
    ~3.7201e-44
    > v = {{alias}}( NaN, NaN )
    NaN

    See Also
    --------