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<b>let </b><font color="Maroon" title="c1">Y</font> be  non <a href="struct_0.html#V3" title="STRUCT_0:attr.3">empty</a>  <a href="pre_topc.html#L1" title="PRE_TOPC:struct.1">TopStruct</a> ;<br/><b>let </b><font color="Maroon" title="c2">Y0</font> be    <a href="tsp_1.html#M2" title="TSP_1:mode.2">SubSpace</a> of <font color="Maroon" title="c1">Y</font>;<br/><b>let </b><font color="Maroon" title="c3">A</font> be   <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <font color="Maroon" title="c1">Y</font>;<br/>





<b>assume </b><a NAME="E1:16"/><i><font color="Green" title="E15">A1</font></i>: 
<font color="Maroon" title="c3">A</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c2">Y0</font>
 ;<br/>

<div><b>hereby </b>
<div class="add"><b>assume </b><a NAME="E1:16_1"/>
<font color="Maroon" title="c3">A</font> is <a href="tsp_2.html#V1" title="TSP_2:attr.1">maximal_T_0</a>
 ;<br/><a NAME="E2:16_1"/><b>then </b>
for <font color="Olive" title="b1">A</font> being  <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <font color="Maroon" title="c1">Y</font>  st <font color="Olive" title="b1">A</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c2">Y0</font> holds <br/><font color="Olive" title="b1">A</font> is <a href="tsp_2.html#V1" title="TSP_2:attr.1">maximal_T_0</a>
 <b>by </b><i><a class="txt" href="tsp_2.html#E1:16"><i><font color="Green" title="E15">A1</font></i></a></i>;<br/><b>hence </b><a NAME="E3:16_1"/>
<font color="Maroon" title="c2">Y0</font> is <a href="tsp_2.html#V2" title="TSP_2:attr.2">maximal_T_0</a>
 <b>by </b><i><a class="ref" href="tsp_2.html#D7" target="_self" title="TSP_2:def.7">Def7</a></i>;<br/></div>
<b>end;</b></div>

<b>thus </b><a NAME="E3:16"/>
( <font color="Maroon" title="c2">Y0</font> is <a href="tsp_2.html#V2" title="TSP_2:attr.2">maximal_T_0</a> implies <font color="Maroon" title="c3">A</font> is <a href="tsp_2.html#V1" title="TSP_2:attr.1">maximal_T_0</a> )
 <b>by </b><i><a class="txt" href="tsp_2.html#E1:16"><i><font color="Green" title="E15">A1</font></i></a>, <a class="ref" href="tsp_2.html#D7" target="_self" title="TSP_2:def.7">Def7</a></i>;<br/>


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