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<b>let </b><font color="Maroon" title="c1">H</font> be   <a href="modelc_1.html#NM1" title="MODELC_1:NM.1">CTL-formula</a>;<br/>

<b>assume </b><a NAME="E1:42"/><i><font color="Green" title="E40">A1</font></i>: 
<font color="Maroon" title="c1">H</font> is <a href="modelc_1.html#V7" title="MODELC_1:attr.7">ExistUntill</a>
 ;<br/>

<a NAME="E2:42"/><b>then </b>
<font color="Maroon" title="c1">H</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> 1 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 4
 
<b>by </b><i><a class="txt" href="modelc_1.html#E29"><i><font color="Green" title="E22">Lm7</font></i></a></i>;<br/>
<a NAME="E3:42"/><b>then </b><i><font color="Green" title="E41">A2</font></i>: 
not <font color="Maroon" title="c1">H</font> is <a href="modelc_1.html#V4" title="MODELC_1:attr.4">conjunctive</a>
 
<b>by </b><i><a class="txt" href="modelc_1.html#E26"><i><font color="Green" title="E19">Lm4</font></i></a></i>;<br/>
<a NAME="E4:42"/><b>then </b>
 ex <font color="Olive" title="b1">H1</font> being  <a href="modelc_1.html#NM1" title="MODELC_1:NM.1">CTL-formula</a> st <font color="Maroon" title="c1">H</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b1">H1</font> <a href="modelc_1.html#K12" title="MODELC_1:func.12">EU</a> <span class="p1">(<span class="default"><a href="modelc_1.html#K17" title="MODELC_1:func.17">the_right_argument_of</a> <font color="Maroon" title="c1">H</font></span>)</span>
 
<b>by </b><i><a class="txt" href="modelc_1.html#E1:42"><i><font color="Green" title="E40">A1</font></i></a>, <a class="ref" href="modelc_1.html#D23" target="_self" title="MODELC_1:def.23">Def23</a></i>;<br/>
<b>hence </b><a NAME="E5:42"/>
<font color="Maroon" title="c1">H</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="modelc_1.html#K16" title="MODELC_1:func.16">the_left_argument_of</a> <font color="Maroon" title="c1">H</font></span>)</span> <a href="modelc_1.html#K12" title="MODELC_1:func.12">EU</a> <span class="p1">(<span class="default"><a href="modelc_1.html#K17" title="MODELC_1:func.17">the_right_argument_of</a> <font color="Maroon" title="c1">H</font></span>)</span>
 <b>by </b><i><a class="txt" href="modelc_1.html#E1:42"><i><font color="Green" title="E40">A1</font></i></a>, <a class="txt" href="modelc_1.html#E3:42"><i><font color="Green" title="E41">A2</font></i></a>, <a class="ref" href="modelc_1.html#D22" target="_self" title="MODELC_1:def.22">Def22</a></i>;<br/>


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