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<b>let </b><font color="Maroon" title="c1">O</font> be  non <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>  <a href="orders_2.html#L1" title="ORDERS_2:struct.1">RelStr</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">O</font> is <a href="orders_2.html#V3" title="ORDERS_2:attr.3">reflexive</a> &amp; <font color="Maroon" title="c1">O</font> is <a href="oposet_1.html#V5" title="OPOSET_1:attr.5">SubSymmetric</a> implies <font color="Maroon" title="c1">O</font> is <a href="necklace.html#V1" title="NECKLACE:attr.1">symmetric</a> )</span><br/>

<b>assume </b><a NAME="E1:71"/><i><font color="Green" title="E41">A1</font></i>: 
( <font color="Maroon" title="c1">O</font> is <a href="orders_2.html#V3" title="ORDERS_2:attr.3">reflexive</a> &amp; <font color="Maroon" title="c1">O</font> is <a href="oposet_1.html#V5" title="OPOSET_1:attr.5">SubSymmetric</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">O</font> is <a href="necklace.html#V1" title="NECKLACE:attr.1">symmetric</a></span><br/>

<b>set </b><font color="Maroon" title="c2">IntRel</font> = the <a href="orders_2.html#U1" title="ORDERS_2:sel.1">InternalRel</a> of <font color="Maroon" title="c1">O</font>;<br/>
<b>set </b><font color="Maroon" title="c3">CO</font> = the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c1">O</font>;<br/>
<a NAME="E2:71"/><i><font color="Green" title="E42">A2</font></i>: 
the <a href="orders_2.html#U1" title="ORDERS_2:sel.1">InternalRel</a> of <font color="Maroon" title="c1">O</font> <a href="relat_2.html#R1" title="RELAT_2:pred.1">is_reflexive_in</a> the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c1">O</font>
 
<b>by </b><i><a class="txt" href="#E1:71"><i><font color="Green" title="E41">A1</font></i></a>, <a class="ref" href="orders_2.html#D4" title="ORDERS_2:def.4">ORDERS_2:def 4</a></i>;<br/>
<a NAME="E3:71"/><i><font color="Green" title="E43">A3</font></i>: 
the <a href="orders_2.html#U1" title="ORDERS_2:sel.1">InternalRel</a> of <font color="Maroon" title="c1">O</font> is <a href="relat_2.html#V3" title="RELAT_2:attr.3">symmetric</a>
 
<b>by </b><i><a class="txt" href="#E1:71"><i><font color="Green" title="E41">A1</font></i></a>, <a class="ref" href="oposet_1.html#D13" target="_self" title="OPOSET_1:def.13">Def13</a></i>;<br/>
<a NAME="E4:71"/>
the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c1">O</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="relat_1.html#K3" title="RELAT_1:func.3">field</a> the <a href="orders_2.html#U1" title="ORDERS_2:sel.1">InternalRel</a> of <font color="Maroon" title="c1">O</font>
 
<b>by </b><i><a class="txt" href="#E2:71"><i><font color="Green" title="E42">A2</font></i></a>, <a class="ref" href="oposet_1.html#T7" target="_self" title="OPOSET_1:th.7">Th7</a></i>;<br/>
<a NAME="E5:71"/><b>then </b>
the <a href="orders_2.html#U1" title="ORDERS_2:sel.1">InternalRel</a> of <font color="Maroon" title="c1">O</font> <a href="relat_2.html#R3" title="RELAT_2:pred.3">is_symmetric_in</a> the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c1">O</font>
 
<b>by </b><i><a class="txt" href="#E3:71"><i><font color="Green" title="E43">A3</font></i></a>, <a class="ref" href="oposet_1.html#T9" target="_self" title="OPOSET_1:th.9">Th9</a></i>;<br/>
<b>hence </b><a NAME="E6:71"/>
<font color="Maroon" title="c1">O</font> is <a href="necklace.html#V1" title="NECKLACE:attr.1">symmetric</a>
 <b>by </b><i><a class="ref" href="necklace.html#D4" title="NECKLACE:def.4">NECKLACE:def 4</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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