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<b>let </b><font color="Maroon">H</font> be   <a href="modelc_1.html#NM1">CTL-formula</a>;<br/>

<b>assume </b><a NAME="E1:42"/><i><font color="Green">E27</font></i>: 
<font color="Maroon">H</font> is <a href="modelc_1.html#V7" target="_self">ExistUntill</a>
 ;<br/>

<a NAME="E2:42"/><b>then </b>
<font color="Maroon">H</font> <a href="funct_1.html#K1">.</a> 1 <a href="hidden.html#R1">=</a> 4
 
<b>by </b><i/>;<br/>
<a NAME="E3:42"/><b>then </b><i><font color="Green">E28</font></i>: 
not <font color="Maroon">H</font> is <a href="modelc_1.html#V4" target="_self">conjunctive</a>
 
<b>by </b><i/>;<br/>
<a NAME="E4:42"/><b>then </b>
 ex <font color="Olive">H1</font> being  <a href="modelc_1.html#NM1">CTL-formula</a> st <font color="Maroon">H</font> <a href="hidden.html#R1">=</a> <font color="Olive">H1</font> <a href="modelc_1.html#K12" target="_self">EU</a> <span class="p1">(<span class="default"><a href="modelc_1.html#K17" target="_self">the_right_argument_of</a> <font color="Maroon">H</font></span>)</span>
 
<b>by </b><i>, <a class="ref" href="modelc_1.html#D4" target="_self">Def4</a></i>;<br/>
<b>hence </b><a NAME="E5:42"/>
<font color="Maroon">H</font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="modelc_1.html#K16" target="_self">the_left_argument_of</a> <font color="Maroon">H</font></span>)</span> <a href="modelc_1.html#K12" target="_self">EU</a> <span class="p1">(<span class="default"><a href="modelc_1.html#K17" target="_self">the_right_argument_of</a> <font color="Maroon">H</font></span>)</span>
 <b>by </b><i>, , <a class="ref" href="modelc_1.html#D3" target="_self">Def3</a></i>;<br/>


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