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<div><span class="kw">theorem </span><a NAME="T47"><span class="comment"><font color="firebrick">:: ANPROJ11:47</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">P</font>, <font color="Olive" title="b2">Q</font> being   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <a href="bkmodel1.html#K4" title="BKMODEL1:func.4">real_projective_plane</a> holds <br/> ( <font color="Olive" title="b1">P</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Olive" title="b2">Q</font> iff  <a href="anproj11.html#K21" title="ANPROJ11:func.21">dual</a> <font color="Olive" title="b1">P</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="anproj11.html#K21" title="ANPROJ11:func.21">dual</a> <font color="Olive" title="b2">Q</font> )</div></div>
