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<b>set </b><font color="Maroon">c<sub>5</sub></font> = <font color="Maroon">c<sub>3</sub></font> <a href="seq_1.html#K4" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font>;<br/>
<a NAME="E1:23_2_1"/><i><font color="Green">E10</font></i>: 
 <a href="relat_1.html#K1">dom</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="seq_1.html#K4" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="relset_1.html#K4">dom</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="subset_1.html#K9">/\</a> <span class="p1">(<span class="default"><a href="relset_1.html#K4">dom</a> <font color="Maroon">c<sub>4</sub></font></span>)</span>
 
<b>by </b><i><a class="ref" href="seq_1.html#D4" target="_self">Def4</a></i>;<br/>
<a NAME="E2:23_2_1"/>
 <a href="relat_1.html#K2">rng</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="seq_1.html#K4" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="tarski.html#R1">c=</a>  <a href="numbers.html#K1">REAL</a> 
 
<b>by </b><i><a class="ref" href="seq_1.html#D1" target="_self">Def1</a></i>;<br/>
<a NAME="E3:23_2_1"/><b>then </b>
<font color="Maroon">c<sub>3</sub></font> <a href="seq_1.html#K4" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font> is   <a href="partfun1.html#NM1">PartFunc</a> of  <a href="relat_1.html#K1">dom</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="seq_1.html#K4" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span>, <a href="numbers.html#K1">REAL</a> 
 
<b>by </b><i><a class="ref" href="partfun1.html#T25">PARTFUN1:25</a></i>;<br/>
<b>hence </b><a NAME="E4:23_2_1"/>
<font color="Maroon">c<sub>3</sub></font> <a href="seq_1.html#K4" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font> is   <a href="partfun1.html#NM1">PartFunc</a> of <font color="Maroon">c<sub>1</sub></font>, <a href="numbers.html#K1">REAL</a> 
 <b>by </b><i><a class="txt" href="seq_1.html#E1:23_2_1"><i><font color="Green">E10</font></i></a>, <a class="ref" href="partfun1.html#T28">PARTFUN1:28</a></i>;<br/>


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