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<b>consider </b><font color="Maroon">f</font> being  <a href="topreal1.html#V4">being_S-Seq</a> <a href="struct_0.html#NM7">FinSequence</a> of <span class="p1">(<span class="default"><a href="euclid.html#K15">TOP-REAL</a> 2</span>)</span>;<br/>
<a NAME="E2:28_1_1"/>
( <font color="Maroon">f</font> is <a href="funct_1.html#V2">one-to-one</a> &amp; <font color="Maroon">f</font> is <a href="topreal1.html#V2">unfolded</a> &amp; <font color="Maroon">f</font> is <a href="topreal1.html#V3">s.n.c.</a> &amp; <font color="Maroon">f</font> is <a href="topreal1.html#V1">special</a> &amp; not <font color="Maroon">f</font> is <a href="realset1.html#V1">trivial</a> )
 
;<br/>
<b>hence </b><a NAME="E3:28_1_1"/>
 ex <font color="Olive">b<sub>1</sub></font> being  <a href="struct_0.html#NM7">FinSequence</a> of <span class="p1">(<span class="default"><a href="euclid.html#K15">TOP-REAL</a> 2</span>)</span> st <br/>( <font color="Olive">b<sub>1</sub></font> is <a href="funct_1.html#V2">one-to-one</a> &amp; <font color="Olive">b<sub>1</sub></font> is <a href="topreal1.html#V2">unfolded</a> &amp; <font color="Olive">b<sub>1</sub></font> is <a href="topreal1.html#V3">s.n.c.</a> &amp; <font color="Olive">b<sub>1</sub></font> is <a href="topreal1.html#V1">special</a> &amp; not <font color="Olive">b<sub>1</sub></font> is <a href="realset1.html#V1">trivial</a> )
 ;<br/>


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