<?xml version="1.0"?>
<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E31">Th22</font></span>: <a NAME="T22"><span class="comment"><font color="firebrick">:: METRIC_1:22</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">x</font>, <font color="Olive" title="b2">y</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of 1 holds  <a href="metric_1.html#K2" title="METRIC_1:func.2">Empty^2-to-zero</a> <a href="binop_1.html#K1" title="BINOP_1:func.1">.</a> (<font color="Olive" title="b1">x</font>,<font color="Olive" title="b2">y</font>) <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <a href="metric_1.html#K2" title="METRIC_1:func.2">Empty^2-to-zero</a> <a href="binop_1.html#K1" title="BINOP_1:func.1">.</a> (<font color="Olive" title="b2">y</font>,<font color="Olive" title="b1">x</font>) <span class="kw">by</span> <span class="lab"><a class="txt" href="metric_1.html#E5"><span class="lab"><font color="Green" title="E4">Lm4</font></span></a></span>;<br/></div></div>
