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<b>let </b><font color="Maroon" title="c1">G</font> be   <a href="group_1.html#NM1" title="GROUP_1:NM.1">Group</a>;<br/><b>let </b><font color="Maroon" title="c2">h</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">G</font>;<br/>



<b>assume </b><a NAME="E1:70"/><i><font color="Green" title="E56">A1</font></i>: 
 <a href="group_1.html#K6" title="GROUP_1:func.6">ord</a> <font color="Maroon" title="c2">h</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1
 ;<br/>

<a NAME="E2:70"/><b>then </b>
not <font color="Maroon" title="c2">h</font> <a href="group_1.html#NR2" title="GROUP_1:NR.2">is_of_order_0</a> 
 
<b>by </b><i><a class="ref" href="group_1.html#D12" target="_self" title="GROUP_1:def.12">Def12</a></i>;<br/>
<a NAME="E3:70"/><b>then </b>
<font color="Maroon" title="c2">h</font> <a href="group_1.html#K5" title="GROUP_1:func.5">|^</a> 1 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="group_1.html#K1" title="GROUP_1:func.1">1_</a> <font color="Maroon" title="c1">G</font>
 
<b>by </b><i><a class="txt" href="group_1.html#E1:70"><i><font color="Green" title="E56">A1</font></i></a>, <a class="ref" href="group_1.html#D12" target="_self" title="GROUP_1:def.12">Def12</a></i>;<br/>
<b>hence </b><a NAME="E4:70"/>
<font color="Maroon" title="c2">h</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="group_1.html#K1" title="GROUP_1:func.1">1_</a> <font color="Maroon" title="c1">G</font>
 <b>by </b><i><a class="ref" href="group_1.html#T44" target="_self" title="GROUP_1:th.44">Th44</a></i>;<br/>


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