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<div><span class="kw">theorem </span><a NAME="T50"><span class="comment"><font color="firebrick">:: REWRITE1:50</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">R</font> being   <a href="relat_1.html#NM1" title="RELAT_1:NM.1">Relation</a> holds <br/> ( <font color="Olive" title="b1">R</font> is  <a href="rewrite1.html#V7" title="REWRITE1:attr.7">confluent</a>  iff <font color="Olive" title="b1">R</font> <a href="rewrite1.html#R11" title="REWRITE1:pred.11">commutes_with</a> <font color="Olive" title="b1">R</font> )</div></div>
