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<a NAME="E1:50_1_1"/>
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<span class="kw">hence </span><a NAME="E2:50_1_1"/>
 not <font color="Maroon" title="c1">A</font> <a href="member_1.html#K7" title="MEMBER_1:func.7">""</a>  is  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a> 
 ; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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