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<b>let </b><font color="Maroon">c<sub>4</sub></font> be   <a href="bhsp_1.html#NM1">RealUnitarySpace</a>;<br/><b>let </b><font color="Maroon">c<sub>5</sub></font> be   <a href="pre_topc.html#NM2">Point</a> of <font color="Maroon">c<sub>4</sub></font>;<br/>



<a NAME="E1:30"/>
<font color="Maroon">c<sub>5</sub></font> <a href="bhsp_1.html#K2" target="_self">.|.</a> <font color="Maroon">H<sub>1</sub></font>(<font color="Maroon">c<sub>4</sub></font>) <a href="hidden.html#R1">=</a> 0
 
<b>by </b><i><a class="ref" href="bhsp_1.html#T19" target="_self">Th19</a></i>;<br/>
<b>hence </b><a NAME="E2:30"/>
<font color="Maroon">c<sub>5</sub></font>, <a href="rlvect_1.html#K1">0.</a> <font color="Maroon">c<sub>4</sub></font> <a href="bhsp_1.html#R1" target="_self">are_orthogonal</a> 
 <b>by </b><i><a class="ref" href="bhsp_1.html#D3" target="_self">Def3</a></i>;<br/>


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