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<div><span class="kw">theorem </span><a NAME="T18"><span class="comment"><font color="firebrick">:: DIRORT:18</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">AS</font> being   <a href="dirort.html#NM1" title="DIRORT:NM.1">Oriented_Orthogonality_Space</a>  st <font color="Olive" title="b1">AS</font> is  <a href="dirort.html#V3" title="DIRORT:attr.3">right_transitive</a>  &amp; ( <font color="Olive" title="b1">AS</font> is  <a href="dirort.html#V5" title="DIRORT:attr.5">Euclidean_like</a>  or <font color="Olive" title="b1">AS</font> is  <a href="dirort.html#V6" title="DIRORT:attr.6">Minkowskian_like</a>  ) holds <br/><font color="Olive" title="b1">AS</font> is  <a href="dirort.html#V4" title="DIRORT:attr.4">left_transitive</a> </div></div>
