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<span class="kw">set </span><font color="Maroon" title="c2">M</font> =  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> ;<br/>
<span class="kw">reconsider </span><font color="Maroon" title="c3">M</font> =  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  as   <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <font color="Maroon" title="c1">V</font> <span class="kw">by</span> <span class="lab"><a class="ref" href="xboole_1.html#T2" title="XBOOLE_1:th.2">XBOOLE_1:2</a></span>;<br/>
<span class="kw">reconsider </span><font color="Maroon" title="c4">M</font> = <font color="Maroon" title="c3">M</font> as   <a href="convex3.html#V1" title="CONVEX3:attr.1">cone</a>  <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <font color="Maroon" title="c1">V</font> <span class="kw">by</span> <span class="lab"><a class="ref" href="convex3.html#T6" target="_self" title="CONVEX3:th.6">Th6</a></span>;<br/>
<span class="kw">take </span>
<font color="Maroon" title="c4">M</font>
; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> ( <font color="Maroon" title="c4">M</font> is  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>  &amp; <font color="Maroon" title="c4">M</font> is  <a href="convex3.html#V1" title="CONVEX3:attr.1">cone</a>  )</span><br/>

<span class="kw">thus </span><a NAME="E3:13_1_1"/>
( <font color="Maroon" title="c4">M</font> is  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>  &amp; <font color="Maroon" title="c4">M</font> is  <a href="convex3.html#V1" title="CONVEX3:attr.1">cone</a>  )
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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