, <i>ee</i>).</p>

<img src='../media/refs/in_comb.png' width='800' style='max-width:800px'/>

<p>Note that the annihilations for <i>y</i> and <i>d</i> are not the same. Furthermore, if one numbers the auxiliary ports, one realizes that it is <i>yy</i>, not <i>dd</i>, which exchanges the ports:</p>

<img src='../media/refs/in_swp.png' width='450'/>

<q>The fundamental laws of computation are <b>commutation</b> and <b>annihilation</b>.</q>

<img src='../media/refs/oiseau_det.png' style='float:right'/>

<ul>
