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<b>let </b><font color="Maroon" title="c1">F</font>, <font color="Maroon" title="c2">G</font>, <font color="Maroon" title="c3">H</font> be  <a href="membered.html#V2" title="MEMBERED:attr.2">ext-real-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"> <font color="Maroon" title="c1">F</font> <a href="member_1.html#K11" title="MEMBER_1:func.11">///</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">G</font> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <font color="Maroon" title="c3">H</font></span>)</span> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">F</font> <a href="member_1.html#K11" title="MEMBER_1:func.11">///</a> <font color="Maroon" title="c2">G</font></span>)</span> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">F</font> <a href="member_1.html#K11" title="MEMBER_1:func.11">///</a> <font color="Maroon" title="c3">H</font></span>)</span></span><br/>





<a NAME="E1:179"/>
<span class="p1">(<span class="default"><font color="Maroon" title="c2">G</font> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <font color="Maroon" title="c3">H</font></span>)</span> <a href="member_1.html#K3" title="MEMBER_1:func.3">""</a>  <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">G</font> <a href="member_1.html#K3" title="MEMBER_1:func.3">""</a> </span>)</span> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <span class="p1">(<span class="default"><font color="Maroon" title="c3">H</font> <a href="member_1.html#K3" title="MEMBER_1:func.3">""</a> </span>)</span>
 
<b>by </b><i><a class="ref" href="member_1.html#T30" target="_self" title="MEMBER_1:th.30">Th30</a></i>;<br/>
<a NAME="E2:179"/><b>then </b><i><font color="Green" title="E90">A1</font></i>: 
<font color="Maroon" title="c1">F</font> <a href="member_1.html#K9" title="MEMBER_1:func.9">**</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c2">G</font> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <font color="Maroon" title="c3">H</font></span>)</span> <a href="member_1.html#K3" title="MEMBER_1:func.3">""</a> </span>)</span> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c1">F</font> <a href="member_1.html#K9" title="MEMBER_1:func.9">**</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c2">G</font> <a href="member_1.html#K3" title="MEMBER_1:func.3">""</a> </span>)</span> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <span class="p2">(<span class="default"><font color="Maroon" title="c3">H</font> <a href="member_1.html#K3" title="MEMBER_1:func.3">""</a> </span>)</span></span>)</span>
 
<b>by </b><i><a class="ref" href="member_1.html#T87" target="_self" title="MEMBER_1:th.87">Th87</a></i>;<br/>
<a NAME="E3:179"/>
<font color="Maroon" title="c1">F</font> <a href="member_1.html#K9" title="MEMBER_1:func.9">**</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c2">G</font> <a href="member_1.html#K3" title="MEMBER_1:func.3">""</a> </span>)</span> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <span class="p2">(<span class="default"><font color="Maroon" title="c3">H</font> <a href="member_1.html#K3" title="MEMBER_1:func.3">""</a> </span>)</span></span>)</span> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">F</font> <a href="member_1.html#K9" title="MEMBER_1:func.9">**</a> <span class="p2">(<span class="default"><font color="Maroon" title="c2">G</font> <a href="member_1.html#K3" title="MEMBER_1:func.3">""</a> </span>)</span></span>)</span> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">F</font> <a href="member_1.html#K9" title="MEMBER_1:func.9">**</a> <span class="p2">(<span class="default"><font color="Maroon" title="c3">H</font> <a href="member_1.html#K3" title="MEMBER_1:func.3">""</a> </span>)</span></span>)</span>
 
<b>by </b><i><a class="ref" href="member_1.html#T89" target="_self" title="MEMBER_1:th.89">Th89</a></i>;<br/>
<b>hence </b><a NAME="E4:179"/>
<font color="Maroon" title="c1">F</font> <a href="member_1.html#K11" title="MEMBER_1:func.11">///</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">G</font> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <font color="Maroon" title="c3">H</font></span>)</span> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">F</font> <a href="member_1.html#K11" title="MEMBER_1:func.11">///</a> <font color="Maroon" title="c2">G</font></span>)</span> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">F</font> <a href="member_1.html#K11" title="MEMBER_1:func.11">///</a> <font color="Maroon" title="c3">H</font></span>)</span>
 <b>by </b><i><a class="txt" href="#E2:179"><i><font color="Green" title="E90">A1</font></i></a>, <a class="ref" href="xboole_1.html#T1" title="XBOOLE_1:th.1">XBOOLE_1:1</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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