<?xml version="1.0"?>
<div><span class="kw">theorem </span><a NAME="T55"><span class="comment"><font color="firebrick">:: YELLOW_9:55</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">T1</font>, <font color="Olive" title="b2">T2</font> being    <a href="pre_topc.html#L1" title="PRE_TOPC:struct.1">TopStruct</a> <br/>  for <font color="Olive" title="b3">T</font> being    <a href="yellow_9.html#M3" title="YELLOW_9:mode.3">Refinement</a> of <font color="Olive" title="b1">T1</font>,<font color="Olive" title="b2">T2</font> holds  <font color="Olive" title="b3">T</font> is    <a href="yellow_9.html#M3" title="YELLOW_9:mode.3">Refinement</a> of <font color="Olive" title="b2">T2</font>,<font color="Olive" title="b1">T1</font></div></div>
