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<a NAME="E1:24_1"/>
 <a href="card_1.html#K1">Card</a> <span class="p1">{<span class="default"> <font color="Maroon">F<sub>4</sub></font>(<font color="Olive">w</font>) where <font color="Olive">w</font> is    <a href="subset_1.html#M1">Element</a> of <font color="Maroon">F<sub>1</sub></font>() : <font color="Olive">w</font> <a href="hidden.html#R2">in</a> <font color="Maroon">F<sub>2</sub></font>() </span>}</span>  <a href="card_1.html#NR1" target="_self">&lt;=`</a>  <a href="card_1.html#K1">Card</a> <font color="Maroon">F<sub>2</sub></font>()
 
<b>from </b><i><a class="ref" href="trees_2.html#S2" target="_self">TREES_2:sch 2</a>();<br/></i>
<b>hence </b><a NAME="E2:24_1"/>
 <a href="card_1.html#K4">card</a> <font color="Maroon">F<sub>3</sub></font>() <a href="xxreal_0.html#R1">&lt;=</a>  <a href="card_1.html#K4">card</a> <font color="Maroon">F<sub>2</sub></font>()
 <b>by </b><i>, <a class="ref" href="card_2.html#T57">CARD_2:57</a></i>;<br/>


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