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<b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">N</font> be   <a href="net_1.html#NM1">Pnet</a>;<br/>



<a NAME="E1:11"/>
the <a href="net_1.html#U1" target="_self">Places</a> of <font color="Maroon">N</font> <a href="xboole_0.html#R1">misses</a> the <a href="net_1.html#U2" target="_self">Transitions</a> of <font color="Maroon">N</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:11"/>
(  not <font color="Maroon">x</font> <a href="hidden.html#R2">in</a> the <a href="net_1.html#U1" target="_self">Places</a> of <font color="Maroon">N</font> or  not <font color="Maroon">x</font> <a href="hidden.html#R2">in</a> the <a href="net_1.html#U2" target="_self">Transitions</a> of <font color="Maroon">N</font> )
 <b>by </b><i><a class="ref" href="xboole_0.html#T3">XBOOLE_0:3</a></i>;<br/>


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