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<b>let </b><font color="Maroon" title="c1">F</font>, <font color="Maroon" title="c2">G</font>, <font color="Maroon" title="c3">H</font> be   <a href="modelc_2.html#NM1" title="MODELC_2:NM.1">LTL-formula</a>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> (  not <font color="Maroon" title="c1">F</font> <a href="modelc_2.html#R3" title="MODELC_2:pred.3">is_proper_subformula_of</a> <font color="Maroon" title="c2">G</font> <a href="modelc_2.html#K5" title="MODELC_2:func.5">'or'</a> <font color="Maroon" title="c3">H</font> or <font color="Maroon" title="c1">F</font> <a href="modelc_2.html#R2" title="MODELC_2:pred.2">is_subformula_of</a> <font color="Maroon" title="c2">G</font> or <font color="Maroon" title="c1">F</font> <a href="modelc_2.html#R2" title="MODELC_2:pred.2">is_subformula_of</a> <font color="Maroon" title="c3">H</font> )</span><br/>





<b>assume </b><a NAME="E1:77"/><i><font color="Green" title="E70">A1</font></i>: 
<font color="Maroon" title="c1">F</font> <a href="modelc_2.html#R3" title="MODELC_2:pred.3">is_proper_subformula_of</a> <font color="Maroon" title="c2">G</font> <a href="modelc_2.html#K5" title="MODELC_2:func.5">'or'</a> <font color="Maroon" title="c3">H</font>
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> ( <font color="Maroon" title="c1">F</font> <a href="modelc_2.html#R2" title="MODELC_2:pred.2">is_subformula_of</a> <font color="Maroon" title="c2">G</font> or <font color="Maroon" title="c1">F</font> <a href="modelc_2.html#R2" title="MODELC_2:pred.2">is_subformula_of</a> <font color="Maroon" title="c3">H</font> )</span><br/>

<a NAME="E2:77"/><i><font color="Green" title="E71">A2</font></i>: 
<font color="Maroon" title="c2">G</font> <a href="modelc_2.html#K5" title="MODELC_2:func.5">'or'</a> <font color="Maroon" title="c3">H</font> is <a href="modelc_2.html#V5" title="MODELC_2:attr.5">disjunctive</a>
 
<b>by </b><i><a class="ref" href="modelc_2.html#D14" target="_self" title="MODELC_2:def.14">Def17</a></i>;<br/>
<a NAME="E3:77"/><b>then </b>
(  <a href="modelc_2.html#K11" title="MODELC_2:func.11">the_left_argument_of</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">G</font> <a href="modelc_2.html#K5" title="MODELC_2:func.5">'or'</a> <font color="Maroon" title="c3">H</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">G</font> &amp;  <a href="modelc_2.html#K12" title="MODELC_2:func.12">the_right_argument_of</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">G</font> <a href="modelc_2.html#K5" title="MODELC_2:func.5">'or'</a> <font color="Maroon" title="c3">H</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">H</font> )
 
<b>by </b><i><a class="ref" href="modelc_2.html#D19" target="_self" title="MODELC_2:def.19">Def22</a>, <a class="ref" href="modelc_2.html#D20" target="_self" title="MODELC_2:def.20">Def23</a></i>;<br/>
<b>hence </b><a NAME="E4:77"/>
( <font color="Maroon" title="c1">F</font> <a href="modelc_2.html#R2" title="MODELC_2:pred.2">is_subformula_of</a> <font color="Maroon" title="c2">G</font> or <font color="Maroon" title="c1">F</font> <a href="modelc_2.html#R2" title="MODELC_2:pred.2">is_subformula_of</a> <font color="Maroon" title="c3">H</font> )
 <b>by </b><i><a class="txt" href="#E1:77"><i><font color="Green" title="E70">A1</font></i></a>, <a class="txt" href="#E2:77"><i><font color="Green" title="E71">A2</font></i></a>, <a class="ref" href="modelc_2.html#T38" target="_self" title="MODELC_2:th.38">Th124</a></i>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/>


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