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Step * of Lemma opposite-lattice-join

∀[L,a,b:Top].  (a ∨ b ~ a ∧ b)
BY
{ ((D 0 THENA Auto)
   THEN RepUR ``opposite-lattice lattice-join`` 0
   THEN RepUR ``mk-bounded-distributive-lattice so_lambda`` 0
   THEN RepUR ``mk-bounded-lattice`` 0
   THEN Auto) }

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Latex:

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Latex:
\mforall{}[L,a,b:Top].    (a  \mvee{}  b  \msim{}  a  \mwedge{}  b)


By

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Latex:
((D  0  THENA  Auto)
  THEN  RepUR  ``opposite-lattice  lattice-join``  0
  THEN  RepUR  ``mk-bounded-distributive-lattice  so\_lambda``  0
  THEN  RepUR  ``mk-bounded-lattice``  0
  THEN  Auto)

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