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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="lattices.html#V10">Lattice-like</a> <a href="lattices.html#V17">Boolean</a> <a href="sheffer1.html#V3" target="_self">distributive'</a>  <a href="lattices.html#L3">LattStr</a> ;<br/>

<a NAME="E1:30"/><i><font color="Green">E30</font></i>: 
<font color="Maroon">c<sub>1</sub></font> is <a href="sheffer1.html#V1" target="_self">upper-bounded'</a>
 
<b>by </b><i><a class="ref" href="sheffer1.html#T14" target="_self">Th14</a></i>;<br/>
<b>set </b><font color="Maroon">c<sub>2</sub></font> =  <a href="lattices.html#K6">Top</a> <font color="Maroon">c<sub>1</sub></font>;<br/>
<a NAME="E2:30"/>
for <font color="Olive">b<sub>1</sub></font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font> holds <br/>( <span class="p1">(<span class="default"><a href="lattices.html#K6">Top</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="lattices.html#K4">"/\"</a> <font color="Olive">b<sub>1</sub></font> <a href="hidden.html#R1">=</a> <font color="Olive">b<sub>1</sub></font> &amp; <font color="Olive">b<sub>1</sub></font> <a href="lattices.html#K4">"/\"</a> <span class="p1">(<span class="default"><a href="lattices.html#K6">Top</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Olive">b<sub>1</sub></font> )
 
<b>by </b><i><a class="ref" href="lattices.html#T43">LATTICES:43</a></i>;<br/>
<b>hence </b><a NAME="E3:30"/>
 <a href="lattices.html#K6">Top</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="sheffer1.html#K1" target="_self">Top'</a> <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="txt" href="sheffer1.html#E1:30"><i><font color="Green">E30</font></i></a>, <a class="ref" href="sheffer1.html#D2" target="_self">Def2</a></i>;<br/>


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