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<b>take </b><font color="Maroon" title="c2">F</font> =  <a href="vectsp_1.html#K2" title="VECTSP_1:func.2">F_Real</a> ;<br/>

<b>let </b><font color="Maroon" title="c3">a</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c2">F</font>; <i><font color="Red">:: according to </font></i><a class="ref" href="vectsp_1.html#D28" target="_self" title="VECTSP_1:def.28">VECTSP_1:def 28</a><br/>

<b>assume </b><a NAME="E1:82_1_1"/><i><font color="Green" title="E32">A1</font></i>: 
<font color="Maroon" title="c3">a</font> <a href="rlvect_1.html#K3" title="RLVECT_1:func.3">+</a> <font color="Maroon" title="c3">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="struct_0.html#K4" title="STRUCT_0:func.4">0.</a> <font color="Maroon" title="c2">F</font>
 ;<br/>

<a NAME="E2:82_1_1"/>
<font color="Maroon" title="c3">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="group_1.html#K2" title="GROUP_1:func.2">1_</a> <font color="Maroon" title="c2">F</font></span>)</span> <a href="group_1.html#K10" title="GROUP_1:func.10">*</a> <font color="Maroon" title="c3">a</font>
 
<b>by </b><i><a class="ref" href="vectsp_1.html#D19" target="_self" title="VECTSP_1:def.19">Def19</a></i>;<br/>
<a NAME="E3:82_1_1"/><b>then </b>
<font color="Maroon" title="c3">a</font> <a href="rlvect_1.html#K3" title="RLVECT_1:func.3">+</a> <font color="Maroon" title="c3">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="group_1.html#K2" title="GROUP_1:func.2">1_</a> <font color="Maroon" title="c2">F</font></span>)</span> <a href="rlvect_1.html#K3" title="RLVECT_1:func.3">+</a> <span class="p2">(<span class="default"><a href="group_1.html#K2" title="GROUP_1:func.2">1_</a> <font color="Maroon" title="c2">F</font></span>)</span></span>)</span> <a href="group_1.html#K10" title="GROUP_1:func.10">*</a> <font color="Maroon" title="c3">a</font>
 
<b>by </b><i><a class="ref" href="vectsp_1.html#D18" target="_self" title="VECTSP_1:def.18">Def18</a></i>;<br/>
<b>hence </b><a NAME="E4:82_1_1"/>
<font color="Maroon" title="c3">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="struct_0.html#K4" title="STRUCT_0:func.4">0.</a> <font color="Maroon" title="c2">F</font>
 <b>by </b><i><a class="txt" href="vectsp_1.html#E1:82_1_1"><i><font color="Green" title="E32">A1</font></i></a>, <a class="ref" href="vectsp_1.html#T44" target="_self" title="VECTSP_1:th.44">Th44</a>, <a class="ref" href="vectsp_1.html#T78" target="_self" title="VECTSP_1:th.78">Th78</a></i>;<br/>


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