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<div><span class="kw">theorem </span><a NAME="T66"><span class="comment"><font color="firebrick">:: MONOID_0:66</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font>, <font color="Olive" title="b2">B</font> being   non  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>   st <font color="Olive" title="b1">A</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Olive" title="b2">B</font> holds <br/><font color="Olive" title="b1">A</font> <a href="monoid_0.html#K9" title="MONOID_0:func.9">*+^</a>  is    <a href="monoid_0.html#M2" title="MONOID_0:mode.2">SubStr</a> of <font color="Olive" title="b2">B</font> <a href="monoid_0.html#K9" title="MONOID_0:func.9">*+^</a> </div></div>
