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<span class="kw">let </span><font color="Maroon" title="c3">L1</font> be   non  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>   <a href="algstr_0.html#L6" title="ALGSTR_0:struct.6">doubleLoopStr</a> ; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> <font color="Maroon" title="c3">L1</font>,<font color="Maroon" title="c3">L1</font> <a href="polynom6.html#NR1" title="POLYNOM6:NR.1">are_isomorphic</a> </span><br/>

<span class="kw">take </span>
 <a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Maroon" title="c3">L1</font>
; <span class="comment"><font color="firebrick">:: according to </font></span><a class="ref" href="quofield.html#D23" title="QUOFIELD:def.23">QUOFIELD:def 23</a> <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide">  <a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Maroon" title="c3">L1</font> is  <a href="quofield.html#V4" title="QUOFIELD:attr.4">RingIsomorphism</a> </span><br/>

<span class="kw">thus </span><a NAME="E1:2_1_1"/>
 <a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Maroon" title="c3">L1</font> is  <a href="quofield.html#V1" title="QUOFIELD:attr.1">RingHomomorphism</a> 
 ; <span class="comment"><font color="firebrick">:: according to </font></span><a class="ref" href="quofield.html#D20" title="QUOFIELD:def.20">QUOFIELD:def 20</a>,<a class="ref" href="quofield.html#D21" title="QUOFIELD:def.21">QUOFIELD:def 21</a> <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> (  <a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Maroon" title="c3">L1</font> is  <a href="funct_1.html#V2" title="FUNCT_1:attr.2">one-to-one</a>  &amp;  <a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Maroon" title="c3">L1</font> is  <a href="quofield.html#V2" title="QUOFIELD:attr.2">RingEpimorphism</a>  )</span><br/>

<span class="kw">thus </span><a NAME="E2:2_1_1"/>
 <a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Maroon" title="c3">L1</font> is  <a href="funct_1.html#V2" title="FUNCT_1:attr.2">one-to-one</a> 
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide">  <a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Maroon" title="c3">L1</font> is  <a href="quofield.html#V2" title="QUOFIELD:attr.2">RingEpimorphism</a> </span><br/>

<span class="kw">thus </span><a NAME="E3:2_1_1"/>
 <a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Maroon" title="c3">L1</font> is  <a href="quofield.html#V1" title="QUOFIELD:attr.1">RingHomomorphism</a> 
 ; <span class="comment"><font color="firebrick">:: according to </font></span><a class="ref" href="quofield.html#D19" title="QUOFIELD:def.19">QUOFIELD:def 19</a> <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> <a href="relset_1.html#K2" title="RELSET_1:func.2">K801</a>( the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c3">L1</font>,<span class="p1">(<span class="default"><a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Maroon" title="c3">L1</font></span>)</span>) <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c3">L1</font></span><br/>

<span class="kw">thus </span> <a href="relat_1.html#K2" title="RELAT_1:func.2">rng</a> <span class="p1">(<span class="default"><a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Maroon" title="c3">L1</font></span>)</span> = 
 <a href="struct_0.html#K2" title="STRUCT_0:func.2">[#]</a> <font color="Maroon" title="c3">L1</font>
<span class="kw">by</span> <span class="lab"><a class="ref" href="topgrp_1.html#T1" title="TOPGRP_1:th.1">TOPGRP_1:1</a></span>
<br/>.= 
 the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c3">L1</font>

; <a class="txt" 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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