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<div><span class="kw">theorem </span><a NAME="T26"><span class="comment"><font color="firebrick">:: TOPALG_5:26</font></span><br/></a><div class="add"> <a href="topalg_5.html#K7" title="TOPALG_5:func.7">Ciso</a>  is  <a href="funct_2.html#V3" title="FUNCT_2:attr.3">bijective</a>  ;<br/></div></div>
