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<b>take </b>
 <a href="sheffer1.html#K4" title="SHEFFER1:func.4">TrivShefferOrthoLattStr</a> 
;<br/>

<b>thus </b><a NAME="E1:49_1_1"/>
(  <a href="sheffer1.html#K4" title="SHEFFER1:func.4">TrivShefferOrthoLattStr</a>  is <a href="sheffer1.html#V9" title="SHEFFER1:attr.9">properly_defined</a> &amp;  <a href="sheffer1.html#K4" title="SHEFFER1:func.4">TrivShefferOrthoLattStr</a>  is <a href="lattices.html#V17" title="LATTICES:attr.17">Boolean</a> &amp;  <a href="sheffer1.html#K4" title="SHEFFER1:func.4">TrivShefferOrthoLattStr</a>  is <a href="robbins1.html#V7" title="ROBBINS1:attr.7">well-complemented</a> &amp;  <a href="sheffer1.html#K4" title="SHEFFER1:func.4">TrivShefferOrthoLattStr</a>  is <a href="lattices.html#V10" title="LATTICES:attr.10">Lattice-like</a> &amp;  <a href="sheffer1.html#K4" title="SHEFFER1:func.4">TrivShefferOrthoLattStr</a>  is <a href="sheffer1.html#V10" title="SHEFFER1:attr.10">satisfying_Sheffer_1</a> &amp;  <a href="sheffer1.html#K4" title="SHEFFER1:func.4">TrivShefferOrthoLattStr</a>  is <a href="sheffer1.html#V11" title="SHEFFER1:attr.11">satisfying_Sheffer_2</a> &amp;  <a href="sheffer1.html#K4" title="SHEFFER1:func.4">TrivShefferOrthoLattStr</a>  is <a href="sheffer1.html#V12" title="SHEFFER1:attr.12">satisfying_Sheffer_3</a> )
 ;<br/>


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