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<div><span class="kw">theorem </span><a NAME="T15"><span class="comment"><font color="firebrick">:: ORDINAL3:15</font></span><br/></a><div class="add">1 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="tarski.html#K1" title="TARSKI:func.1">{</a><span class="default"><a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a></span><a href="tarski.html#K1" title="TARSKI:func.1">}</a></span> <span class="kw">by</span> <span class="lab"><a class="txt" href="ordinal3.html#E14"><span class="lab"><font color="Green" title="E5">Lm1</font></span></a></span>;<br/></div></div>
