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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E26">Th27</font></span>: <a NAME="T27"><span class="comment"><font color="firebrick">:: HEYTING3:27</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">k</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="numbers.html#NK1" title="NUMBERS:NK.1">NAT</a>   holds  <a href="heyting3.html#K4" title="HEYTING3:func.4">PFBrt</a> (1,<font color="Olive" title="b1">k</font>) <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</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></div></div>
