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<b>let </b><font color="Maroon">C</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="altcat_1.html#L2">AltCatStr</a> ;<br/><b>let </b><font color="Maroon">D</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="altcat_2.html#M1" target="_self">SubCatStr</a> of <font color="Maroon">C</font>;<br/><b>let </b><font color="Maroon">o</font> be   <a href="altcat_1.html#NM1">object</a> of <font color="Maroon">D</font>;<br/>





<a NAME="E1:66"/><i><font color="Green">E16</font></i>: 
<font color="Maroon">o</font> <a href="hidden.html#R2">in</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">D</font>
 
;<br/>
<a NAME="E2:66"/>
the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">D</font> <a href="tarski.html#R1">c=</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">C</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:66"/>
<font color="Maroon">o</font> is   <a href="altcat_1.html#NM1">object</a> of <font color="Maroon">C</font>
 <b>by </b><i/>;<br/>


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