e complex plane is said to be a <em>simple</em> if $z(t_1) \neq z(t_2)$ for
                    $t_1 \neq t_2,$ except possibly for $t = a$ and $t = b.$ $C$ is a <em>closed curve</em> if $z(a) =
                    z(b).$
                </p>

                <div class="figure-container">
                    <div>
                        <figure>
                            <img src="../images/chp04/simple-curve.svg" alt="Simple curve" title="Simple curve" style="width:100%;">
                            <