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<b>let </b><font color="Maroon">n</font> be   <a href="nat_1.html#NM1">Nat</a>;<br/><b>let </b><font color="Maroon">K</font> be   <a href="vectsp_1.html#NM2">Field</a>;<br/>



<a NAME="E1:69"/><i><font color="Green">E35</font></i>: 
( <span class="p1">(<span class="default"><a href="matrix_1.html#K12">1.</a> <font color="Maroon">K</font>,<font color="Maroon">n</font></span>)</span> <a href="matrix_6.html#K5" target="_self">~</a>  <a href="hidden.html#R1">=</a>  <a href="matrix_1.html#K12">1.</a> <font color="Maroon">K</font>,<font color="Maroon">n</font> &amp;  <a href="matrix_1.html#K12">1.</a> <font color="Maroon">K</font>,<font color="Maroon">n</font> is <a href="matrix_6.html#V1" target="_self">invertible</a> )
 
<b>by </b><i/>;<br/>
<a NAME="E2:69"/>
<span class="p1">(<span class="default"><a href="matrix_1.html#K12">1.</a> <font color="Maroon">K</font>,<font color="Maroon">n</font></span>)</span> <a href="matrix_1.html#K5">@</a>  <a href="hidden.html#R1">=</a>  <a href="matrix_1.html#K12">1.</a> <font color="Maroon">K</font>,<font color="Maroon">n</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:69"/>
 <a href="matrix_1.html#K12">1.</a> <font color="Maroon">K</font>,<font color="Maroon">n</font> is <a href="matrix_6.html#V4" target="_self">Orthogonal</a>
 <b>by </b><i>, </i>;<br/>


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