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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E3">Th8</font></span>: <a NAME="T3"><span class="comment"><font color="firebrick">:: HILBERT4:3</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">f</font> being   <a href="funct_1.html#NM1" title="FUNCT_1:NM.1">Function</a>  st <font color="Olive" title="b1">f</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <font color="Olive" title="b1">f</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="partfun1.html#K6" title="PARTFUN1:func.6">id</a> <span class="p1">(<span class="default"><a href="relat_1.html#NK1" title="RELAT_1:NK.1">dom</a> <font color="Olive" title="b1">f</font></span>)</span> holds <br/><font color="Olive" title="b1">f</font> is  <a href="partit_2.html#V1" title="PARTIT_2:attr.1">involutive</a> </div></div>
