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<b>take </b><font color="Maroon" title="c2">V</font> = <span class="p1"><a href="domain_1.html#K6" title="DOMAIN_1:func.6">{</a><span class="default"><span class="p2">(<span class="default"><a href="struct_0.html#K4" title="STRUCT_0:func.4">0.</a> <font color="Maroon" title="c1">X</font></span>)</span></span><a href="domain_1.html#K6" title="DOMAIN_1:func.6">}</a></span>;<br/>

<b>thus </b><a NAME="E1:37_1_1"/>
not <font color="Maroon" title="c2">V</font> is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>
 ;<br/>

<b>thus </b><a NAME="E2:37_1_1"/>
<font color="Maroon" title="c2">V</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="rltopsp1.html#K2" title="RLTOPSP1:func.2">-</a> <font color="Maroon" title="c2">V</font>
 <b>by </b><i><a class="ref" href="rltopsp1.html#T13" target="_self" title="RLTOPSP1:th.13">Th13</a></i>; <i><font color="Red">:: according to </font></i><a class="ref" href="rltopsp1.html#D5" target="_self" title="RLTOPSP1:def.5">RLTOPSP1:def 5</a><br/>


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