<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">c<sub>1</sub></font> be  non <a href="struct_0.html#V3">empty</a> <a href="pre_topc.html#V2">TopSpace-like</a>  <a href="waybel_9.html#L1">TopRelStr</a> ;<br/>

<b>assume </b><a NAME="E1:51_1_1"/><i><font color="Green">E28</font></i>: 
for <font color="Olive">b<sub>1</sub></font> being  <a href="pre_topc.html#NM2">Point</a> of <font color="Maroon">c<sub>1</sub></font>ex <font color="Olive">b<sub>2</sub></font> being   <a href="yellow_8.html#M1">Basis</a> of <font color="Olive">b<sub>1</sub></font> st <br/>for <font color="Olive">b<sub>3</sub></font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">c<sub>1</sub></font> st <font color="Olive">b<sub>3</sub></font> <a href="hidden.html#R2">in</a> <font color="Olive">b<sub>2</sub></font> holds <br/> <a href="yellow_0.html#K5">subrelstr</a> <font color="Olive">b<sub>3</sub></font> is <a href="yellow_0.html#V5">meet-inheriting</a>
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="waybel30.html#D4" target="_self">WAYBEL30:def 4</a><br/>

<b>let </b><font color="Maroon">c<sub>2</sub></font> be   <a href="pre_topc.html#NM2">Point</a> of <font color="Maroon">c<sub>1</sub></font>; <i><font color="Red">:: according to </font></i><a class="ref" href="waybel30.html#D2" target="_self">WAYBEL30:def 2</a><br/>

<b>consider </b><font color="Maroon">c<sub>3</sub></font> being    <a href="yellow_8.html#M1">Basis</a> of <font color="Maroon">c<sub>2</sub></font><b> such that </b><br/><a NAME="E3:51_1_1"/><i><font color="Green">E29</font></i>: 
for <font color="Olive">b<sub>1</sub></font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">c<sub>1</sub></font> st <font color="Olive">b<sub>1</sub></font> <a href="hidden.html#R2">in</a> <font color="Maroon">c<sub>3</sub></font> holds <br/> <a href="yellow_0.html#K5">subrelstr</a> <font color="Olive">b<sub>1</sub></font> is <a href="yellow_0.html#V5">meet-inheriting</a>
 <b>by </b><i><a class="txt" href="waybel30.html#E1:51_1_1"><i><font color="Green">E28</font></i></a></i>;<br/>
<b>reconsider </b><font color="Maroon">c<sub>4</sub></font> = <font color="Maroon">c<sub>3</sub></font> as    <a href="yellow13.html#M1">basis</a> of <font color="Maroon">c<sub>2</sub></font> <b>by </b><i><a class="ref" href="yellow13.html#T23">YELLOW13:23</a></i>;<br/>
<b>take </b>
<font color="Maroon">c<sub>4</sub></font>
;<br/>

<b>thus </b><a NAME="E5:51_1_1"/>
for <font color="Olive">b<sub>1</sub></font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">c<sub>1</sub></font> st <font color="Olive">b<sub>1</sub></font> <a href="hidden.html#R2">in</a> <font color="Maroon">c<sub>4</sub></font> holds <br/> <a href="yellow_0.html#K5">subrelstr</a> <font color="Olive">b<sub>1</sub></font> is <a href="yellow_0.html#V5">meet-inheriting</a>
 <b>by </b><i><a class="txt" href="waybel30.html#E3:51_1_1"><i><font color="Green">E29</font></i></a></i>;<br/>


</div>
