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<b>set </b><font color="Maroon" title="c4">F</font> =  <a href="seq_1.html#K20" title="SEQ_1:func.20">abs</a> <font color="Maroon" title="c3">f</font>;<br/>
<a NAME="E1:42_1_1"/><i><font color="Green" title="E19">A1</font></i>: 
 <a href="relat_1.html#K1" title="RELAT_1:func.1">dom</a> <span class="p1">(<span class="default"><a href="seq_1.html#K20" title="SEQ_1:func.20">abs</a> <font color="Maroon" title="c3">f</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="relset_1.html#K4" title="RELSET_1:func.4">dom</a> <font color="Maroon" title="c3">f</font>
 
<b>by </b><i><a class="ref" href="seq_1.html#D10" target="_self" title="SEQ_1:def.10">Def10</a></i>;<br/>
<a NAME="E2:42_1_1"/>
 <a href="relat_1.html#K2" title="RELAT_1:func.2">rng</a> <span class="p1">(<span class="default"><a href="seq_1.html#K20" title="SEQ_1:func.20">abs</a> <font color="Maroon" title="c3">f</font></span>)</span> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a>  <a href="numbers.html#K1" title="NUMBERS:func.1">REAL</a> 
 
<b>by </b><i><a class="ref" href="seq_1.html#D1" target="_self" title="SEQ_1:def.1">Def1</a></i>;<br/>
<a NAME="E3:42_1_1"/><b>then </b>
 <a href="seq_1.html#K20" title="SEQ_1:func.20">abs</a> <font color="Maroon" title="c3">f</font> is   <a href="partfun1.html#NM1" title="PARTFUN1:NM.1">PartFunc</a> of  <a href="relat_1.html#K1" title="RELAT_1:func.1">dom</a> <span class="p1">(<span class="default"><a href="seq_1.html#K20" title="SEQ_1:func.20">abs</a> <font color="Maroon" title="c3">f</font></span>)</span>, <a href="numbers.html#K1" title="NUMBERS:func.1">REAL</a> 
 
<b>by </b><i><a class="ref" href="partfun1.html#T25" title="PARTFUN1:th.25">PARTFUN1:25</a></i>;<br/>
<b>hence </b><a NAME="E4:42_1_1"/>
 <a href="seq_1.html#K20" title="SEQ_1:func.20">abs</a> <font color="Maroon" title="c3">f</font> is   <a href="partfun1.html#NM1" title="PARTFUN1:NM.1">PartFunc</a> of <font color="Maroon" title="c1">C</font>, <a href="numbers.html#K1" title="NUMBERS:func.1">REAL</a> 
 <b>by </b><i><a class="txt" href="seq_1.html#E1:42_1_1"><i><font color="Green" title="E19">A1</font></i></a>, <a class="ref" href="partfun1.html#T28" title="PARTFUN1:th.28">PARTFUN1:28</a></i>;<br/>


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