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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E30">Th41</font></span>: <a NAME="T41"><span class="comment"><font color="firebrick">:: EXCHSORT:41</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">x</font>, <font color="Olive" title="b2">y</font>, <font color="Olive" title="b3">X</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds   <a href="funct_7.html#K9" title="FUNCT_7:func.9">Swap</a> (<span class="p1">(<span class="default"><a href="partfun1.html#K6" title="PARTFUN1:func.6">id</a> <font color="Olive" title="b3">X</font></span>)</span>,<font color="Olive" title="b1">x</font>,<font color="Olive" title="b2">y</font>) is  <a href="funct_1.html#V2" title="FUNCT_1:attr.2">one-to-one</a> </div></div>
