Step * 1 of Lemma lattice-fset-join_functionality_wrt_subset2


1. BoundedLattice
2. eq EqDecider(Point(l))
3. s1 fset(Point(l))
4. s2 fset(Point(l))
5. s1 ⊆ {0} ⋃ s2
⊢ \/({0} ⋃ s2) ≤ \/(s2)
BY
((BLemma `lattice-le_weakening` THEN Auto) THEN (RWO "lattice-fset-join-union" THENA Auto)) }

1
1. BoundedLattice
2. eq EqDecider(Point(l))
3. s1 fset(Point(l))
4. s2 fset(Point(l))
5. s1 ⊆ {0} ⋃ s2
⊢ \/({0}) ∨ \/(s2) \/(s2) ∈ Point(l)


Latex:


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{}/(\{0\}  \mcup{}  s2)  \mleq{}  \mbackslash{}/(s2)


By


Latex:
((BLemma  `lattice-le\_weakening`  THEN  Auto)  THEN  (RWO  "lattice-fset-join-union"  0  THENA  Auto))




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