<?xml version="1.0"?>
<div>:: <span class="kw">deftheorem </span><span class="lab"><font color="Green" title="E88">Def10</font></span>   defines <a href="surrealn.html#V3" title="SURREALN:attr.3">No_ordinal</a> <a onclick="hs(this)" href="javascript:()">SURREALN:def 10 : <br/></a><span> for <font color="Olive" title="b1">x</font> being   <a href="surreal0.html#NM1" title="SURREAL0:NM.1">Surreal</a> holds <br/> ( <font color="Olive" title="b1">x</font> is  <a href="surrealn.html#V3" title="SURREALN:attr.3">No_ordinal</a>  iff  <a href="surreal0.html#K2" title="SURREAL0:func.2">R_</a> <font color="Olive" title="b1">x</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  );<br/></span></div>
