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<div><span class="kw">theorem </span><a NAME="T42"><span class="comment"><font color="firebrick">:: RELAT_1:42</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">R</font> being   <a href="relat_1.html#NM1" title="RELAT_1:NM.1">Relation</a> holds <br/> (  <a href="relat_1.html#NK1" title="RELAT_1:NK.1">dom</a> <font color="Olive" title="b1">R</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  iff  <a href="relat_1.html#NK2" title="RELAT_1:NK.2">rng</a> <font color="Olive" title="b1">R</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  ) <span class="kw">by</span> <span class="lab"><a class="ref" href="relat_1.html#T38" target="_self" onmouseover="rs('relat_1/T38')" onmouseout="rh()">Th32</a>, <a class="ref" href="relat_1.html#T41" target="_self" onmouseover="rs('relat_1/T41')" onmouseout="rh()">Th35</a></span>;<br/></div></div>
