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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E1">Th52</font></span>: <a NAME="T1"><span class="comment"><font color="firebrick">:: MEASURE9:1</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">K</font> being   <a href="relat_1.html#NM1" title="RELAT_1:NM.1">Relation</a>  st  <a href="relat_1.html#NK2" title="RELAT_1:NK.2">rng</a> <font color="Olive" title="b1">K</font> is  <a href="setfam_1.html#V2" title="SETFAM_1:attr.2">empty-membered</a>  holds <br/> <a href="tarski.html#K3" title="TARSKI:func.3">union</a> <span class="p1">(<span class="default"><a href="relat_1.html#NK2" title="RELAT_1:NK.2">rng</a> <font color="Olive" title="b1">K</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> </div></div>
