<?xml version="1.0"?>
<div><span class="kw">theorem </span><a NAME="T20"><span class="comment"><font color="firebrick">:: BCIALG_4:20</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font> being   <a href="bcialg_4.html#NM1" title="BCIALG_4:NM.1">BCI-Algebra_with_Condition(S)</a><br/>  for <font color="Olive" title="b2">x</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Olive" title="b1">X</font> holds  <font color="Olive" title="b2">x</font> <a href="bcialg_4.html#K6" title="BCIALG_4:func.6">|^</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="struct_0.html#K4" title="STRUCT_0:func.4">0.</a> <font color="Olive" title="b1">X</font> <span class="kw">by</span> <span class="lab"><a class="ref" href="bcialg_4.html#D6" target="_self" onmouseover="rs('bcialg_4/D6')" onmouseout="rh()">Def6</a></span>;<br/></div></div>
