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Step * 2 of Lemma lattice-fset-join_functionality_wrt_subset2


1. l : BoundedLattice
2. eq : EqDecider(Point(l))
3. s1 : fset(Point(l))
4. s2 : fset(Point(l))
5. s1 ⊆ {0} ⋃ s2
⊢ \/(s1) ≤ \/({0} ⋃ s2)
BY
{ (UsingVars [`eq'] (BLemma `lattice-fset-join_functionality_wrt_subset`)⋅ THEN Auto) }

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Latex:

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Latex:

1.  l  :  BoundedLattice
2.  eq  :  EqDecider(Point(l))
3.  s1  :  fset(Point(l))
4.  s2  :  fset(Point(l))
5.  s1  \msubseteq{}  \{0\}  \mcup{}  s2
\mvdash{}  \mbackslash{}/(s1)  \mleq{}  \mbackslash{}/(\{0\}  \mcup{}  s2)


By

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Latex:
(UsingVars  [`eq']  (BLemma  `lattice-fset-join\_functionality\_wrt\_subset`)\mcdot{}  THEN  Auto)

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