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<a NAME="E1:12_1_1"/>
 <a href="pboole.html#K1" title="PBOOLE:func.1">[0]</a> <font color="Maroon" title="c1">I</font> <a href="pboole.html#R2" title="PBOOLE:pred.2">c=</a> <font color="Maroon" title="c2">M</font>
 
<b>by </b><i><a class="ref" href="mboolean.html#T5" title="MBOOLEAN:th.5">MBOOLEAN:5</a></i>;<br/>
<a NAME="E2:12_1_1"/><b>then </b>
 <a href="pboole.html#K1" title="PBOOLE:func.1">[0]</a> <font color="Maroon" title="c1">I</font> <a href="pboole.html#R1" title="PBOOLE:pred.1">in</a>  <a href="mssubfam.html#K7" title="MSSUBFAM:func.7">bool</a> <font color="Maroon" title="c2">M</font>
 
<b>by </b><i><a class="ref" href="mboolean.html#T1" title="MBOOLEAN:th.1">MBOOLEAN:1</a></i>;<br/>
<b>then reconsider </b><font color="Maroon" title="c3">a</font> =  <a href="pboole.html#K1" title="PBOOLE:func.1">[0]</a> <font color="Maroon" title="c1">I</font> as    <a href="pboole.html#M2" title="PBOOLE:mode.2">Element</a> of  <a href="mssubfam.html#K7" title="MSSUBFAM:func.7">bool</a> <font color="Maroon" title="c2">M</font> <b>by </b><i><a class="ref" href="mssubfam.html#T11" title="MSSUBFAM:th.11">MSSUBFAM:11</a></i>;<br/>
<b>take </b>
<font color="Maroon" title="c3">a</font>
;<br/>

<b>thus </b><a NAME="E4:12_1_1"/>
( <font color="Maroon" title="c3">a</font> is <a href="relat_1.html#V3" title="RELAT_1:attr.3">empty-yielding</a> &amp; <font color="Maroon" title="c3">a</font> is <a href="finset_1.html#V2" title="FINSET_1:attr.2">locally-finite</a> )
 ;<br/>


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