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<b>let </b><font color="Maroon" title="c1">X</font> be   <a href="csspace.html#NM1" title="CSSPACE:NM.1">ComplexUnitarySpace</a>;<br/><b>let </b><font color="Maroon" title="c2">x</font> be   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <font color="Maroon" title="c1">X</font>;<br/><b>let </b><font color="Maroon" title="c3">r</font> be   <a href="real_1.html#NM1" title="REAL_1:NM.1">Real</a>;<br/>





<b>assume </b><a NAME="E1:55"/>
<font color="Maroon" title="c3">r</font> <a href="xxreal_0.html#NR2" title="XXREAL_0:NR.2">&gt;=</a> 0
 ;<br/>

<a NAME="E2:55"/><b>then </b>
 <a href="csspace.html#K15" title="CSSPACE:func.15">dist</a> <font color="Maroon" title="c2">x</font>,<font color="Maroon" title="c2">x</font> <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c3">r</font>
 
<b>by </b><i><a class="ref" href="csspace.html#T53" title="CSSPACE:th.53">CSSPACE:53</a></i>;<br/>
<b>hence </b><a NAME="E3:55"/>
<font color="Maroon" title="c2">x</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="clvect_2.html#K5" title="CLVECT_2:func.5">cl_Ball</a> <font color="Maroon" title="c2">x</font>,<font color="Maroon" title="c3">r</font>
 <b>by </b><i><a class="ref" href="clvect_2.html#T48" target="_self" title="CLVECT_2:th.48">Th48</a></i>;<br/>


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