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<b>let </b><font color="Maroon">GS</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="rlvect_1.html#L1">LoopStr</a> ;<br/>

<b>assume </b><a NAME="E1:6"/><i><font color="Green">E22</font></i>: 
the <a href="struct_0.html#U2">Zero</a> of <font color="Maroon">GS</font> <a href="binop_1.html#R3">is_a_unity_wrt</a> the <a href="rlvect_1.html#U1">add</a> of <font color="Maroon">GS</font>
 ;<br/>

<b>let </b><font color="Maroon">x</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">GS</font>; <i><font color="Red">:: according to </font></i><a class="ref" href="rlvect_1.html#D7">RLVECT_1:def 7</a><br/>

<b>thus </b><font color="Maroon">x</font> <a href="rlvect_1.html#K2">+</a> <span class="p1">(<span class="default"><a href="rlvect_1.html#K1">0.</a> <font color="Maroon">GS</font></span>)</span> = 
the <a href="rlvect_1.html#U1">add</a> of <font color="Maroon">GS</font> <a href="binop_1.html#K2">.</a> <font color="Maroon">x</font>,the <a href="struct_0.html#U2">Zero</a> of <font color="Maroon">GS</font>
<b>by </b><i><a class="ref" href="rlvect_1.html#T5">RLVECT_1:5</a></i>
<br/>.= 
<font color="Maroon">x</font>
<b>by </b><i>, <a class="ref" href="binop_1.html#T11">BINOP_1:11</a></i>
;<br/>


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