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<b>let </b><font color="Maroon" title="c4">S</font>, <font color="Maroon" title="c5">T</font> be  non <a href="struct_0.html#V3" title="STRUCT_0:attr.3">empty</a> <a href="pre_topc.html#NM1" title="PRE_TOPC:NM.1">TopSpace</a>;<br/><b>let </b><font color="Maroon" title="c6">s</font> be   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <font color="Maroon" title="c4">S</font>;<br/><b>let </b><font color="Maroon" title="c7">t</font> be   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <font color="Maroon" title="c5">T</font>;<br/>







<b>take </b>
 <a href="topalg_4.html#K13" title="TOPALG_4:func.13">FGPrIso</a> <font color="Maroon" title="c6">s</font>,<font color="Maroon" title="c7">t</font>
; <i><font color="Red">:: according to </font></i><a class="ref" href="group_6.html#D15" title="GROUP_6:def.15">GROUP_6:def 15</a><br/>

<b>thus </b><a NAME="E1:45"/>
 <a href="topalg_4.html#K13" title="TOPALG_4:func.13">FGPrIso</a> <font color="Maroon" title="c6">s</font>,<font color="Maroon" title="c7">t</font> is <a href="group_6.html#V4" title="GROUP_6:attr.4">being_isomorphism</a>
 <b>by </b><i><a class="ref" href="topalg_4.html#T29" target="_self" title="TOPALG_4:th.29">Th29</a></i>;<br/>


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