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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E18">Th19</font></span>: <a NAME="T20"><span class="comment"><font color="firebrick">:: TREES_1:20</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">T</font> being   <a href="trees_1.html#NM1" title="TREES_1:NM.1">Tree</a><br/>  for <font color="Olive" title="b2">p</font>, <font color="Olive" title="b3">q</font> being   <a href="finseq_1.html#NM1" title="FINSEQ_1:NM.1">FinSequence</a>  st <font color="Olive" title="b2">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <font color="Olive" title="b1">T</font> &amp; <font color="Olive" title="b3">q</font> <a href="tarski.html#R1" title="TARSKI:pred.1">is_a_prefix_of</a> <font color="Olive" title="b2">p</font> holds <br/><font color="Olive" title="b3">q</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <font color="Olive" title="b1">T</font></div></div>
