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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  non <a href="struct_0.html#V3">empty</a>  <a href="orders_2.html#L1">RelStr</a> ;<br/>

<b>assume </b><a NAME="E1:148_1_1"/>
( <font color="Maroon">c<sub>1</sub></font> is   <a href="waybel_0.html#NM8">LATTICE</a> &amp; <font color="Maroon">c<sub>1</sub></font> is <a href="yellow_0.html#V3">bounded</a> &amp; <font color="Maroon">c<sub>1</sub></font> is <a href="waybel_1.html#V2" target="_self">distributive</a> &amp; <font color="Maroon">c<sub>1</sub></font> is <a href="waybel_1.html#V10" target="_self">complemented</a> )
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="waybel_1.html#D25" target="_self">WAYBEL_1:def 25</a><br/>

<b>hence </b><a NAME="E2:148_1_1"/>
<font color="Maroon">c<sub>1</sub></font> is <a href="waybel_1.html#V9" target="_self">Heyting</a>
 <b>by </b><i><a class="ref" href="waybel_1.html#T90" target="_self">Th90</a></i>;<br/>


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