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<span class="kw">consider </span><font color="Maroon" title="c2">A</font> being  non  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> , <font color="Maroon" title="c3">m</font> being   <a href="binop_1.html#NM2" title="BINOP_1:NM.2">BinOp</a> of <font color="Maroon" title="c2">A</font>, <font color="Maroon" title="c4">h</font> being   <a href="group_9.html#NM1" title="GROUP_9:NM.1">Action</a> of <font color="Maroon" title="c1">O</font>,<font color="Maroon" title="c2">A</font>;<br/>
<span class="kw">take </span>
 <a href="group_9.html#G1" title="GROUP_9:aggr.1">HGrWOpStr</a>(# <font color="Maroon" title="c2">A</font>,<font color="Maroon" title="c3">m</font>,<font color="Maroon" title="c4">h</font> #)
; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> not  <a href="group_9.html#G1" title="GROUP_9:aggr.1">HGrWOpStr</a>(# <font color="Maroon" title="c2">A</font>,<font color="Maroon" title="c3">m</font>,<font color="Maroon" title="c4">h</font> #) is  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a> </span><br/>

<span class="kw">thus </span><a NAME="E2:8_1_1"/>
not  <a href="group_9.html#G1" title="GROUP_9:aggr.1">HGrWOpStr</a>(# <font color="Maroon" title="c2">A</font>,<font color="Maroon" title="c3">m</font>,<font color="Maroon" title="c4">h</font> #) is  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a> 
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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