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<b>consider </b><font color="Maroon" title="c9">k</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c4">F</font><b> such that </b><br/><a NAME="E2:26_1_1"/><i><font color="Green" title="E22">A2</font></i>: 
<font color="Maroon" title="c8">x</font> <a href="rlvect_1.html#K6" title="RLVECT_1:func.6">-</a> <span class="p1">(<span class="default"><font color="Maroon" title="c9">k</font> <a href="vectsp_1.html#K6" title="VECTSP_1:func.6">*</a> <font color="Maroon" title="c7">b</font></span>)</span> <a href="symsp_1.html#R1" title="SYMSP_1:pred.1">_|_</a> <font color="Maroon" title="c6">a</font>
 <b>by </b><i><a class="txt" href="symsp_1.html#E1:26"><i><font color="Green" title="E21">A1</font></i></a>, <a class="ref" href="symsp_1.html#D2" target="_self" title="SYMSP_1:def.2">Def2</a></i>;<br/>
<b>take </b>
<font color="Maroon" title="c9">k</font>
;<br/>

<b>let </b><font color="Maroon" title="c10">l</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c4">F</font>;<br/>

<b>assume </b><a NAME="E3:26_1_1"/>
<font color="Maroon" title="c8">x</font> <a href="rlvect_1.html#K6" title="RLVECT_1:func.6">-</a> <span class="p1">(<span class="default"><font color="Maroon" title="c10">l</font> <a href="vectsp_1.html#K6" title="VECTSP_1:func.6">*</a> <font color="Maroon" title="c7">b</font></span>)</span> <a href="symsp_1.html#R1" title="SYMSP_1:pred.1">_|_</a> <font color="Maroon" title="c6">a</font>
 ;<br/>

<b>hence </b><a NAME="E4:26_1_1"/>
<font color="Maroon" title="c9">k</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c10">l</font>
 <b>by </b><i><a class="txt" href="symsp_1.html#E1:26"><i><font color="Green" title="E21">A1</font></i></a>, <a class="txt" href="symsp_1.html#E2:26_1_1"><i><font color="Green" title="E22">A2</font></i></a>, <a class="ref" href="symsp_1.html#T24" target="_self" title="SYMSP_1:th.24">Th24</a></i>;<br/>


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