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<b>let </b><font color="Maroon" title="c1">L</font> be  non <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a> <a href="pre_topc.html#NM1" title="PRE_TOPC:NM.1">TopSpace</a>;<br/><b>let </b><font color="Maroon" title="c2">N</font> be   <a href="waybel_0.html#NM2" title="WAYBEL_0:NM.2">net</a> of <font color="Maroon" title="c1">L</font>;<br/><b>let </b><font color="Maroon" title="c3">M</font> be    <a href="yellow_6.html#M2" title="YELLOW_6:mode.2">subnet</a> of <font color="Maroon" title="c2">N</font>;<br/><b>let </b><font color="Maroon" title="c4">c</font> be   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <font color="Maroon" title="c1">L</font>;<br/>







<b>assume </b><a NAME="E1:85"/><i><font color="Green" title="E38">A1</font></i>: 
<font color="Maroon" title="c4">c</font> <a href="waybel_9.html#R3" title="WAYBEL_9:pred.3">is_a_cluster_point_of</a> <font color="Maroon" title="c3">M</font>
 ;<br/>

<b>let </b><font color="Maroon" title="c5">O</font> be    <a href="connsp_2.html#M1" title="CONNSP_2:mode.1">a_neighborhood</a> of <font color="Maroon" title="c4">c</font>; <i><font color="Red">:: according to </font></i><a class="ref" href="waybel_9.html#D9" target="_self" title="WAYBEL_9:def.9">WAYBEL_9:def 9</a><br/>

<a NAME="E2:85"/>
<font color="Maroon" title="c3">M</font> <a href="waybel_0.html#R2" title="WAYBEL_0:pred.2">is_often_in</a> <font color="Maroon" title="c5">O</font>
 
<b>by </b><i><a class="txt" href="waybel_9.html#E1:85"><i><font color="Green" title="E38">A1</font></i></a>, <a class="ref" href="waybel_9.html#D9" target="_self" title="WAYBEL_9:def.9">Def9</a></i>;<br/>
<b>hence </b><a NAME="E3:85"/>
<font color="Maroon" title="c2">N</font> <a href="waybel_0.html#R2" title="WAYBEL_0:pred.2">is_often_in</a> <font color="Maroon" title="c5">O</font>
 <b>by </b><i><a class="ref" href="yellow_6.html#T27" title="YELLOW_6:th.27">YELLOW_6:27</a></i>;<br/>


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