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<div>:: <span class="kw">deftheorem </span><span class="lab"><font color="Green" title="E21">Def6</font></span>   defines <a href="surrealo.html#K3" title="SURREALO:func.3">born_eq_set</a> <a onclick="hs(this)" href="javascript:()">SURREALO:def 6 : <br/></a><span> for <font color="Olive" title="b1">x</font> being   <a href="surreal0.html#NM1" title="SURREAL0:NM.1">Surreal</a><br/>  for <font color="Olive">b<sub>2</sub></font> being   <a href="surreal0.html#V3" title="SURREAL0:attr.3">surreal-membered</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds <br/> ( <font color="Olive">b<sub>2</sub></font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="surrealo.html#K3" title="SURREALO:func.3">born_eq_set</a> <font color="Olive" title="b1">x</font> iff  for <font color="Olive" title="b3">y</font> being   <a href="surreal0.html#NM1" title="SURREAL0:NM.1">Surreal</a> holds <br/> ( <font color="Olive" title="b3">y</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <font color="Olive">b<sub>2</sub></font> iff ( <font color="Olive" title="b3">y</font> <a href="surrealo.html#R2" title="SURREALO:pred.2">==</a> <font color="Olive" title="b1">x</font> &amp; <font color="Olive" title="b3">y</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="surreal0.html#K10" title="SURREAL0:func.10">Day</a> <span class="p1">(<span class="default"><a href="surrealo.html#K2" title="SURREALO:func.2">born_eq</a> <font color="Olive" title="b1">x</font></span>)</span> ) ) );<br/></span></div>
