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<b>let </b><font color="Maroon">R</font> be   <a href="vectsp_2.html#NM2">domRing</a>;<br/><b>let </b><font color="Maroon">V</font> be   <a href="vectsp_2.html#NM6">LeftMod</a> of <font color="Maroon">R</font>;<br/><b>let </b><font color="Maroon">A</font> be   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">V</font>;<br/><b>let </b><font color="Maroon">B</font> be   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">V</font>;<br/>







<b>assume </b><a NAME="E1:16"/><i><font color="Green">E26</font></i>: 
<font color="Maroon">A</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">B</font>
 ;<br/>

<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="16_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">v</font> be   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font>;<br/><b>assume </b><a NAME="E1:16_1"/>
<font color="Maroon">v</font> <a href="rlvect_1.html#R1">in</a>  <a href="lmod_5.html#K1" target="_self">Lin</a> <font color="Maroon">A</font>
 ;<br/><b>then consider </b><font color="Maroon">l</font> being    <a href="vectsp_6.html#M2">Linear_Combination</a> of <font color="Maroon">A</font><b> such that </b><br/><a NAME="E3:16_1"/><i><font color="Green">E27</font></i>: 
<font color="Maroon">v</font> <a href="hidden.html#R1">=</a>  <a href="vectsp_6.html#K4">Sum</a> <font color="Maroon">l</font>
 <b>by </b><i/>;<br/><b>reconsider </b><font color="Maroon">l</font> = <font color="Maroon">l</font> as    <a href="vectsp_6.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> <b>by </b><i>, <a class="ref" href="vectsp_6.html#T25">VECTSP_6:25</a></i>;<br/><a NAME="E5:16_1"/>
 <a href="vectsp_6.html#K4">Sum</a> <font color="Maroon">l</font> <a href="hidden.html#R1">=</a> <font color="Maroon">v</font>
 <b>by </b><i/>;<br/><b>hence </b><a NAME="E6:16_1"/>
<font color="Maroon">v</font> <a href="rlvect_1.html#R1">in</a>  <a href="lmod_5.html#K1" target="_self">Lin</a> <font color="Maroon">B</font>
 <b>by </b><i/>;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E3:16"/>
 <a href="lmod_5.html#K1" target="_self">Lin</a> <font color="Maroon">A</font> is    <a href="vectsp_4.html#M1">Subspace</a> of  <a href="lmod_5.html#K1" target="_self">Lin</a> <font color="Maroon">B</font>
 <b>by </b><i><a class="ref" href="vectsp_4.html#T36">VECTSP_4:36</a></i>;<br/>


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