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<b>let </b><font color="Maroon">K</font> be   <a href="funcsdom.html#NM1">Ring</a>;<br/><b>let </b><font color="Maroon">V</font> be   <a href="vectsp_2.html#NM6">LeftMod</a> of <font color="Maroon">K</font>;<br/><b>let </b><font color="Maroon">a1</font> be   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font>;<br/><b>let </b><font color="Maroon">a2</font> be   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font>;<br/><b>let </b><font color="Maroon">W</font> be    <a href="vectsp_4.html#M1">Subspace</a> of <font color="Maroon">V</font>;<br/>









<a NAME="E1:37"/>
( <font color="Maroon">a2</font> <a href="hidden.html#R2">in</a> <font color="Maroon">a1</font> <a href="vectsp_4.html#K3">+</a> <font color="Maroon">W</font> iff <font color="Maroon">a1</font> <a href="vectsp_4.html#K3">+</a> <font color="Maroon">W</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a2</font> <a href="vectsp_4.html#K3">+</a> <font color="Maroon">W</font> )
 
<b>by </b><i><a class="ref" href="vectsp_4.html#T70">VECTSP_4:70</a></i>;<br/>
<b>hence </b><a NAME="E2:37"/>
( <font color="Maroon">a1</font> <a href="vectsp_4.html#K3">+</a> <font color="Maroon">W</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a2</font> <a href="vectsp_4.html#K3">+</a> <font color="Maroon">W</font> iff <font color="Maroon">a1</font> <a href="rlvect_1.html#K6">-</a> <font color="Maroon">a2</font> <a href="rlvect_1.html#R1">in</a> <font color="Maroon">W</font> )
 <b>by </b><i/>;<br/>


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