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<b>let </b><font color="Maroon">R</font> be  non <a href="struct_0.html#V3">empty</a> <a href="rlvect_1.html#V5">right_zeroed</a> <a href="vectsp_1.html#V4">right-distributive</a> <a href="algstr_1.html#V1">left_zeroed</a> <a href="algstr_1.html#V3">add-right-cancelable</a>  <a href="vectsp_1.html#L3">doubleLoopStr</a> ;<br/><b>let </b><font color="Maroon">I</font> be  <a href="ideal_1.html#V1" target="_self">add-closed</a> <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">R</font>;<br/><b>let </b><font color="Maroon">J</font> be  non <a href="xboole_0.html#V1">empty</a> <a href="ideal_1.html#V3" target="_self">right-ideal</a> <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">R</font>, <font color="Maroon">K</font> be  non <a href="xboole_0.html#V1">empty</a> <a href="ideal_1.html#V3" target="_self">right-ideal</a> <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">R</font>;<br/>





<div><i><font color="Green">E41</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="146_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">u</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:146_1"/>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font></span>)</span>
 ;<br/><a NAME="E2:146_1"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">a'</font> where <font color="Olive">a'</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">a'</font> <a href="ideal_1.html#K10" target="_self">*</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font></span>)</span> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> </span>}</span> 
 ;<br/><b>then consider </b><font color="Maroon">a</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font><b> such that </b><br/><a NAME="E4:146_1"/><i><font color="Green">E42</font></i>: 
( <font color="Maroon">u</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a</font> &amp; <font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font></span>)</span> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> )
 ;<br/><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="146_1_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">u</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:146_1_1"/>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">K</font>
 ;<br/><a NAME="E2:146_1_1"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Olive">j</font></span>)</span> where <font color="Olive">j</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">j</font> <a href="hidden.html#R2">in</a> <font color="Maroon">K</font> </span>}</span> 
 ;<br/><b>then consider </b><font color="Maroon">j</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font><b> such that </b><br/><a NAME="E4:146_1_1"/><i><font color="Green">E43</font></i>: 
( <font color="Maroon">u</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Maroon">j</font> &amp; <font color="Maroon">j</font> <a href="hidden.html#R2">in</a> <font color="Maroon">K</font> )
 ;<br/><a NAME="E5:146_1_1"/>
<font color="Maroon">K</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font>
 <b>by </b><i><a class="ref" href="ideal_1.html#T10" target="_self">Th10</a></i>;<br/><a NAME="E6:146_1_1"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Olive">j'</font></span>)</span> where <font color="Olive">j'</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">j'</font> <a href="hidden.html#R2">in</a> <font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font> </span>}</span> 
 <b>by </b><i><a class="ref" href="ideal_1.html#T14" target="_self">Th14</a></i>;<br/><a NAME="E7:146_1_1"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font></span>)</span>
 ;<br/><b>hence </b><a NAME="E8:146_1_1"/>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font>
 <b>by </b><i><a class="ref" href="ideal_1.html#T13" target="_self">Th13</a></i>;<br/></div><b>end;</b></div><a NAME="E6:146_1"/><b>then </b>
<font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">K</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font>
 <b>by </b><i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a></i>;<br/><a NAME="E7:146_1"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">a'</font> where <font color="Olive">a'</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">a'</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">K</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> </span>}</span> 
 <b>by </b><i><a class="ref" href="ideal_1.html#T13" target="_self">Th13</a></i>;<br/><a NAME="E8:146_1"/><b>then </b><i><font color="Green">E44</font></i>: 
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">K</font>
 ;<br/><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="146_1_2"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">u</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:146_1_2"/>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">J</font>
 ;<br/><a NAME="E2:146_1_2"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Olive">j</font></span>)</span> where <font color="Olive">j</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">j</font> <a href="hidden.html#R2">in</a> <font color="Maroon">J</font> </span>}</span> 
 ;<br/><b>then consider </b><font color="Maroon">j</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font><b> such that </b><br/><a NAME="E4:146_1_2"/><i><font color="Green">E72</font></i>: 
( <font color="Maroon">u</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Maroon">j</font> &amp; <font color="Maroon">j</font> <a href="hidden.html#R2">in</a> <font color="Maroon">J</font> )
 ;<br/><a NAME="E5:146_1_2"/>
<font color="Maroon">J</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font>
 <b>by </b><i><a class="ref" href="ideal_1.html#T6" target="_self">Th6</a></i>;<br/><a NAME="E6:146_1_2"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Olive">j'</font></span>)</span> where <font color="Olive">j'</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">j'</font> <a href="hidden.html#R2">in</a> <font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font> </span>}</span> 
 <b>by </b><i><a class="ref" href="ideal_1.html#T17" target="_self">Th17</a></i>;<br/><a NAME="E7:146_1_2"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font></span>)</span>
 ;<br/><b>hence </b><a NAME="E8:146_1_2"/>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font>
 <b>by </b><i><a class="ref" href="ideal_1.html#T13" target="_self">Th13</a></i>;<br/></div><b>end;</b></div><a NAME="E10:146_1"/><b>then </b>
<font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">J</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font>
 <b>by </b><i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a></i>;<br/><a NAME="E11:146_1"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">a'</font> where <font color="Olive">a'</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">a'</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">J</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> </span>}</span> 
 <b>by </b><i><a class="ref" href="ideal_1.html#T13" target="_self">Th13</a></i>;<br/><a NAME="E12:146_1"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">J</font>
 ;<br/><a NAME="E13:146_1"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">x</font> where <font color="Olive">x</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : ( <font color="Olive">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">J</font> &amp; <font color="Olive">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">K</font> ) </span>}</span> 
 <b>by </b><i><a class="ref" href="ideal_1.html#T14" target="_self">Th14</a></i>;<br/><b>hence </b><a NAME="E14:146_1"/>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">(<span class="default"><font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">J</font></span>)</span> <a href="ideal_1.html#K13" target="_self">/\</a> <span class="p1">(<span class="default"><font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">K</font></span>)</span>
 ;<br/></div><b>end;</b></div>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="146_2"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">u</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:146_2"/>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">(<span class="default"><font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">J</font></span>)</span> <a href="ideal_1.html#K13" target="_self">/\</a> <span class="p1">(<span class="default"><font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">K</font></span>)</span>
 ;<br/><a NAME="E2:146_2"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">x</font> where <font color="Olive">x</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : ( <font color="Olive">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">J</font> &amp; <font color="Olive">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">K</font> ) </span>}</span> 
 ;<br/><b>then consider </b><font color="Maroon">x</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font><b> such that </b><br/><a NAME="E4:146_2"/><i><font color="Green">E76</font></i>: 
( <font color="Maroon">u</font> <a href="hidden.html#R1">=</a> <font color="Maroon">x</font> &amp; <font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">J</font> &amp; <font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">K</font> )
 ;<br/><a NAME="E5:146_2"/><i><font color="Green">E77</font></i>: 
( <font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">a</font> where <font color="Olive">a</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">J</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> </span>}</span>  &amp; <font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">a</font> where <font color="Olive">a</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">K</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> </span>}</span>  )
 <b>by </b><i><a class="ref" href="ideal_1.html#T13" target="_self">Th13</a></i>;<br/><b>then consider </b><font color="Maroon">a</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font><b> such that </b><br/><a NAME="E7:146_2"/><i><font color="Green">E78</font></i>: 
( <font color="Maroon">u</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a</font> &amp; <font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">J</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> )
 ;<br/><b>consider </b><font color="Maroon">b</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font><b> such that </b><br/><a NAME="E9:146_2"/><i><font color="Green">E79</font></i>: 
( <font color="Maroon">u</font> <a href="hidden.html#R1">=</a> <font color="Maroon">b</font> &amp; <font color="Maroon">b</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">K</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> )
 <b>by </b><i><a class="ref" href="ideal_1.html#T14" target="_self">Th14</a></i>;<br/><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="146_2_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">v</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:146_2_1"/>
<font color="Maroon">v</font> <a href="hidden.html#R2">in</a> <font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font></span>)</span>
 ;<br/><a NAME="E2:146_2_1"/><b>then </b>
<font color="Maroon">v</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Olive">j</font></span>)</span> where <font color="Olive">j</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">j</font> <a href="hidden.html#R2">in</a> <font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font> </span>}</span> 
 ;<br/><b>then consider </b><font color="Maroon">j</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font><b> such that </b><br/><a NAME="E4:146_2_1"/><i><font color="Green">E82</font></i>: 
( <font color="Maroon">v</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Maroon">j</font> &amp; <font color="Maroon">j</font> <a href="hidden.html#R2">in</a> <font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font> )
 ;<br/><a NAME="E5:146_2_1"/>
<font color="Maroon">j</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Olive">x'</font> <a href="rlvect_1.html#K2">+</a> <font color="Olive">y</font></span>)</span> where <font color="Olive">x'</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font>, <font color="Olive">y</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : ( <font color="Olive">x'</font> <a href="hidden.html#R2">in</a> <font color="Maroon">J</font> &amp; <font color="Olive">y</font> <a href="hidden.html#R2">in</a> <font color="Maroon">K</font> ) </span>}</span> 
 <b>by </b><i/>;<br/><b>then consider </b><font color="Maroon">x'</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font>, <font color="Maroon">y</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font><b> such that </b><br/><a NAME="E7:146_2_1"/><i><font color="Green">E83</font></i>: 
( <font color="Maroon">j</font> <a href="hidden.html#R1">=</a> <font color="Maroon">x'</font> <a href="rlvect_1.html#K2">+</a> <font color="Maroon">y</font> &amp; <font color="Maroon">x'</font> <a href="hidden.html#R2">in</a> <font color="Maroon">J</font> &amp; <font color="Maroon">y</font> <a href="hidden.html#R2">in</a> <font color="Maroon">K</font> )
 ;<br/><a NAME="E8:146_2_1"/><i><font color="Green">E119</font></i>: 
<font color="Maroon">v</font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Maroon">x'</font></span>)</span> <a href="rlvect_1.html#K2">+</a> <span class="p1">(<span class="default"><font color="Maroon">b</font> <a href="group_1.html#K1">*</a> <font color="Maroon">y</font></span>)</span>
 <b>by </b><i><a class="ref" href="ideal_1.html#T17" target="_self">Th17</a>, , , , <a class="ref" href="vectsp_1.html#D11">VECTSP_1:def 11</a></i>;<br/><a NAME="E9:146_2_1"/>
<font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Maroon">x'</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Olive">j'</font></span>)</span> where <font color="Olive">j'</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">j'</font> <a href="hidden.html#R2">in</a> <font color="Maroon">J</font> </span>}</span> 
 <b>by </b><i/>;<br/><a NAME="E10:146_2_1"/><b>then </b><i><font color="Green">E120</font></i>: 
<font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Maroon">x'</font> <a href="hidden.html#R2">in</a> <font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">J</font>
 ;<br/><a NAME="E11:146_2_1"/>
<font color="Maroon">b</font> <a href="group_1.html#K1">*</a> <font color="Maroon">y</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Maroon">b</font> <a href="group_1.html#K1">*</a> <font color="Olive">j'</font></span>)</span> where <font color="Olive">j'</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">j'</font> <a href="hidden.html#R2">in</a> <font color="Maroon">K</font> </span>}</span> 
 <b>by </b><i/>;<br/><a NAME="E12:146_2_1"/><b>then </b>
<font color="Maroon">b</font> <a href="group_1.html#K1">*</a> <font color="Maroon">y</font> <a href="hidden.html#R2">in</a> <font color="Maroon">b</font> <a href="ideal_1.html#K10" target="_self">*</a> <font color="Maroon">K</font>
 ;<br/><b>hence </b><a NAME="E13:146_2_1"/>
<font color="Maroon">v</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font>
 <b>by </b><i><a class="ref" href="ideal_1.html#T17" target="_self">Th17</a>, , , , </i>;<br/></div><b>end;</b></div><a NAME="E11:146_2"/><b>then </b>
<font color="Maroon">a</font> <a href="ideal_1.html#K10" target="_self">*</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font></span>)</span> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font>
 <b>by </b><i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a></i>;<br/><a NAME="E12:146_2"/><b>then </b>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">a'</font> where <font color="Olive">a'</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">a'</font> <a href="ideal_1.html#K10" target="_self">*</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font></span>)</span> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> </span>}</span> 
 <b>by </b><i><a class="ref" href="ideal_1.html#T17" target="_self">Th17</a></i>;<br/><b>hence </b><a NAME="E13:146_2"/>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font></span>)</span>
 ;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E3:146"/>
<font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="ideal_1.html#K11" target="_self">+</a> <font color="Maroon">K</font></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">J</font></span>)</span> <a href="ideal_1.html#K13" target="_self">/\</a> <span class="p1">(<span class="default"><font color="Maroon">I</font> <a href="ideal_1.html#K16" target="_self">%</a> <font color="Maroon">K</font></span>)</span>
 <b>by </b><i>, <a class="ref" href="tarski.html#T2">TARSKI:2</a></i>;<br/>


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