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<b>let </b><font color="Maroon">I1</font> be    <a href="dynkin.html#M1" target="_self">Dynkin_System</a> of <font color="Maroon">Omega</font>, <font color="Maroon">I2</font> be    <a href="dynkin.html#M1" target="_self">Dynkin_System</a> of <font color="Maroon">Omega</font>;<br/>

<b>assume </b><a NAME="E1:34_1_2"/><i><font color="Green">E32</font></i>: 
( <font color="Maroon">E</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I1</font> &amp; ( for <font color="Olive">D</font> being   <a href="dynkin.html#M1" target="_self">Dynkin_System</a> of <font color="Maroon">Omega</font>  st <font color="Maroon">E</font> <a href="tarski.html#R1">c=</a> <font color="Olive">D</font> holds <br/><font color="Maroon">I1</font> <a href="tarski.html#R1">c=</a> <font color="Olive">D</font> ) )
 ;<br/>

<b>assume </b><a NAME="E2:34_1_2"/>
( <font color="Maroon">E</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I2</font> &amp; ( for <font color="Olive">D</font> being   <a href="dynkin.html#M1" target="_self">Dynkin_System</a> of <font color="Maroon">Omega</font>  st <font color="Maroon">E</font> <a href="tarski.html#R1">c=</a> <font color="Olive">D</font> holds <br/><font color="Maroon">I2</font> <a href="tarski.html#R1">c=</a> <font color="Olive">D</font> ) )
 ;<br/>

<a NAME="E3:34_1_2"/><b>then </b>
( <font color="Maroon">I1</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I2</font> &amp; <font color="Maroon">I2</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I1</font> )
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E4:34_1_2"/>
<font color="Maroon">I1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">I2</font>
 <b>by </b><i><a class="ref" href="xboole_0.html#D10">XBOOLE_0:def 10</a></i>;<br/>


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