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<b>let </b><font color="Maroon" title="c1">B</font> be  non <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>  <a href="orders_2.html#L1" title="ORDERS_2:struct.1">RelStr</a> ;<br/>

<b>assume </b><a NAME="E1:148_1_1"/>
( <font color="Maroon" title="c1">B</font> is   <a href="waybel_0.html#NM8" title="WAYBEL_0:NM.8">LATTICE</a> &amp; <font color="Maroon" title="c1">B</font> is <a href="yellow_0.html#V3" title="YELLOW_0:attr.3">bounded</a> &amp; <font color="Maroon" title="c1">B</font> is <a href="waybel_1.html#V2" title="WAYBEL_1:attr.2">distributive</a> &amp; <font color="Maroon" title="c1">B</font> is <a href="waybel_1.html#V10" title="WAYBEL_1:attr.10">complemented</a> )
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="waybel_1.html#D25" target="_self" title="WAYBEL_1:def.25">WAYBEL_1:def 25</a><br/>

<b>hence </b><a NAME="E2:148_1_1"/>
<font color="Maroon" title="c1">B</font> is <a href="waybel_1.html#V9" title="WAYBEL_1:attr.9">Heyting</a>
 <b>by </b><i><a class="ref" href="waybel_1.html#T90" target="_self" title="WAYBEL_1:th.90">Th90</a></i>;<br/>


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