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<b>let </b><font color="Maroon" title="c1">A</font>, <font color="Maroon" title="c2">B</font> be  <a href="membered.html#V1" title="MEMBERED:attr.1">complex-membered</a>  <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> <span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="xboole_0.html#K5" title="XBOOLE_0:func.5">\+\</a> <font color="Maroon" title="c2">B</font></span>)</span> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a> </span>)</span> <a href="xboole_0.html#K5" title="XBOOLE_0:func.5">\+\</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a> </span>)</span></span><br/>



<b>thus </b><span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="xboole_0.html#K5" title="XBOOLE_0:func.5">\+\</a> <font color="Maroon" title="c2">B</font></span>)</span> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a>  = 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="subset_1.html#K6" title="SUBSET_1:func.6">\</a> <font color="Maroon" title="c2">B</font></span>)</span> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a> </span>)</span> <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="subset_1.html#K6" title="SUBSET_1:func.6">\</a> <font color="Maroon" title="c1">A</font></span>)</span> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a> </span>)</span>
<b>by </b><i><a class="ref" href="member_1.html#T38" target="_self" title="MEMBER_1:th.38">Th38</a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a> </span>)</span> <a href="subset_1.html#K6" title="SUBSET_1:func.6">\</a> <span class="p2">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a> </span>)</span></span>)</span> <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="subset_1.html#K6" title="SUBSET_1:func.6">\</a> <font color="Maroon" title="c1">A</font></span>)</span> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a> </span>)</span>
<b>by </b><i><a class="ref" href="member_1.html#T40" target="_self" title="MEMBER_1:th.40">Th40</a></i>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a> </span>)</span> <a href="xboole_0.html#K5" title="XBOOLE_0:func.5">\+\</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="member_1.html#K4" title="MEMBER_1:func.4">""</a> </span>)</span>
<b>by </b><i><a class="ref" href="member_1.html#T40" target="_self" title="MEMBER_1:th.40">Th40</a></i>
; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/>


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