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<b>let </b><font color="Maroon">p</font> be   <a href="funct_7.html#NM1">FuncSequence</a>;<br/>

<div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="86_1"><b>per </b></a><a class="txt" onclick="hs(this)" href="javascript:()"><b>cases </b></a><span class="hide"><a NAME="E1:86_1"/>
( <font color="Maroon">p</font> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a>  or <font color="Maroon">p</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="xboole_0.html#K1">{}</a>  )
 </span>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="86_1_1"><b>suppose </b></a><a NAME="E1:86_1_1"/>
<font color="Maroon">p</font> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 ;<br/><div class="add"><a NAME="E2:86_1_1"/><b>then </b>
 <a href="funct_7.html#K4" target="_self">compose</a> <font color="Maroon">p</font>,<span class="p1">(<span class="default"><a href="funct_7.html#K6" target="_self">firstdom</a> <font color="Maroon">p</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="partfun1.html#K6">id</a> <span class="p1">(<span class="default"><a href="funct_7.html#K6" target="_self">firstdom</a> <font color="Maroon">p</font></span>)</span>
 <b>by </b><i/>;<br/><b>hence </b><a NAME="E3:86_1_1"/>
 <a href="relat_1.html#K1">dom</a> <span class="p1">(<span class="default"><a href="funct_7.html#K4" target="_self">compose</a> <font color="Maroon">p</font>,<span class="p2">(<span class="default"><a href="funct_7.html#K6" target="_self">firstdom</a> <font color="Maroon">p</font></span>)</span></span>)</span> <a href="hidden.html#R1">=</a>  <a href="funct_7.html#K6" target="_self">firstdom</a> <font color="Maroon">p</font>
 <b>by </b><i><a class="ref" href="relat_1.html#T71">RELAT_1:71</a></i>;<br/></div><b>end;</b></div><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="86_1_2"><b>suppose </b></a><a NAME="E1:86_1_2"/>
<font color="Maroon">p</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="xboole_0.html#K1">{}</a> 
 ;<br/><div class="add"><a NAME="E2:86_1_2"/><b>then </b>
 <a href="relat_1.html#K1">dom</a> <span class="p1">(<span class="default"><a href="funct_7.html#K4" target="_self">compose</a> <font color="Maroon">p</font>,<span class="p2">(<span class="default"><a href="funct_7.html#K6" target="_self">firstdom</a> <font color="Maroon">p</font></span>)</span></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="funct_7.html#K6" target="_self">firstdom</a> <font color="Maroon">p</font></span>)</span> <a href="xboole_0.html#K3">/\</a> <span class="p1">(<span class="default"><a href="funct_7.html#K6" target="_self">firstdom</a> <font color="Maroon">p</font></span>)</span>
 <b>by </b><i/>;<br/><b>hence </b><a NAME="E3:86_1_2"/>
 <a href="relat_1.html#K1">dom</a> <span class="p1">(<span class="default"><a href="funct_7.html#K4" target="_self">compose</a> <font color="Maroon">p</font>,<span class="p2">(<span class="default"><a href="funct_7.html#K6" target="_self">firstdom</a> <font color="Maroon">p</font></span>)</span></span>)</span> <a href="hidden.html#R1">=</a>  <a href="funct_7.html#K6" target="_self">firstdom</a> <font color="Maroon">p</font>
 ;<br/></div><b>end;</b></div></div><b>end;</b></div>

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