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<a NAME="E1:45_1_1"/><i><font color="Green" title="E26">A1</font></i>: 
 <a href="grcat_1.html#K7" title="GRCAT_1:func.7">id</a> <font color="Maroon" title="c1">T</font> <a href="tops_2.html#NR1" title="TOPS_2:NR.1">is_homeomorphism</a> 
 
<b>by </b><i><a class="ref" href="topgrp_1.html#T20" target="_self" title="TOPGRP_1:th.20">Th20</a></i>;<br/>
<a NAME="E2:45_1_1"/><b>then </b>
<font color="Maroon" title="c1">T</font>,<font color="Maroon" title="c1">T</font> <a href="t_0topsp.html#R1" title="T_0TOPSP:pred.1">are_homeomorphic</a> 
 
<b>by </b><i><a class="ref" href="t_0topsp.html#D1" title="T_0TOPSP:def.1">T_0TOPSP:def 1</a></i>;<br/>
<b>then reconsider </b><font color="Maroon" title="c2">f</font> =  <a href="grcat_1.html#K7" title="GRCAT_1:func.7">id</a> <font color="Maroon" title="c1">T</font> as    <a href="topgrp_1.html#M1" title="TOPGRP_1:mode.1">Homeomorphism</a> of <font color="Maroon" title="c1">T</font>,<font color="Maroon" title="c1">T</font> <b>by </b><i><a class="txt" href="topgrp_1.html#E1:45_1_1"><i><font color="Green" title="E26">A1</font></i></a>, <a class="ref" href="topgrp_1.html#D3" target="_self" title="TOPGRP_1:def.3">Def3</a></i>;<br/>
<a NAME="E4:45_1_1"/>
<font color="Maroon" title="c2">f</font> <a href="tops_2.html#NR1" title="TOPS_2:NR.1">is_homeomorphism</a> 
 
<b>by </b><i><a class="ref" href="topgrp_1.html#T20" target="_self" title="TOPGRP_1:th.20">Th20</a></i>;<br/>
<b>hence </b><a NAME="E5:45_1_1"/>
 ex <font color="Olive">b<sub>1</sub></font> being  <a href="struct_0.html#NM6" title="STRUCT_0:NM.6">Function</a> of <font color="Maroon" title="c1">T</font>,<font color="Maroon" title="c1">T</font> st <font color="Olive">b<sub>1</sub></font> <a href="tops_2.html#NR1" title="TOPS_2:NR.1">is_homeomorphism</a> 
 ;<br/>


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