bsp;&nbsp;&nbsp;&nbsp;&nbsp;


        'N' don't</p>
      <p style="font-family: monospace;" class="MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Hilbert


        transforming is used to eliminate</p>
      <p style="font-family: monospace;" class="MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
the
left


        travelling wave.</p>
      <p style="font-family: monospace;" class="MsoPlainText">&nbsp;&nbsp;&nbsp;&