<?xml version="1.0"?>
<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E30">SQsub</font></span>: <a NAME="T19"><span class="comment"><font color="firebrick">:: REALALG1:19</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">R</font> being   <a href="vectsp_1.html#NM3" title="VECTSP_1:NM.3">Ring</a><br/>  for <font color="Olive" title="b2">S</font> being    <a href="c0sp1.html#M1" title="C0SP1:mode.1">Subring</a> of <font color="Olive" title="b1">R</font> holds   <a href="realalg1.html#NK4" title="REALALG1:NK.4">SQ</a> <font color="Olive" title="b2">S</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a>  <a href="realalg1.html#NK4" title="REALALG1:NK.4">SQ</a> <font color="Olive" title="b1">R</font></div></div>
