<commit_before>
{{alias}}( x )
    Evaluates the Riemann zeta function as a function of a real variable `s`
    (i.e., `t = 0`).

    The Riemann zeta function is the analytic continuation of the infinite
    series

                __ oo        1
    zeta(s)  = \           -----
               /__ k = 1     s
                            k

    where `s` is a complex variable equal to `σ + ti`. The series is only
    convergent when the real part of `s`, `σ`, is greater than `1`.

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

    Returns
    -------
    y: number
        Function value.

    Examples
    --------
    > var v = {{alias}}( 1.1 )
    ~10.584
    > v = {{alias}}( -4.0 )
    0.0
    > v = {{alias}}( 70.0 )
    1.0
    > v = {{alias}}( 0.5 )
    ~-1.46
    > v = {{alias}}( 1.0 ) // pole
    NaN
    > v = {{alias}}( NaN )
    NaN

    See Also
    --------
<commit_msg>Rename parameter, remove ASCII equation, and update example<commit_after>
{{alias}}( s )
    Evaluates the Riemann zeta function as a function of a real variable `s`.

    Parameters
    ----------
    s: number
        Input value.

    Returns
    -------
    y: number
        Function value.

    Examples
    --------
    > var y = {{alias}}( 1.1 )
    ~10.584
    > y = {{alias}}( -4.0 )
    0.0
    > y = {{alias}}( 70.0 )
    1.0
    > y = {{alias}}( 0.5 )
    ~-1.46
    > y = {{alias}}( NaN )
    NaN

    // Evaluate at a pole:
    > y = {{alias}}( 1.0 )
    NaN

    See Also
    --------

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