Step
*
1
of Lemma
lattice-fset-meet-is-glb
1. l : BoundedLattice
2. eq : EqDecider(Point(l))
⊢ ∀s:fset(Point(l)). ∀[x:Point(l)]. /\(s) ≤ x supposing x ∈ s
BY
{ (UsingVars [`eq'] (BLemma `fset-induction`)⋅ THEN Auto THEN Reduce (-1) THEN Auto) }
1
1. l : BoundedLattice
2. eq : EqDecider(Point(l))
3. s : fset(Point(l))
4. x : Point(l)
5. x ∈ s
⊢ SqStable(/\(s) ≤ x)
2
1. l : BoundedLattice
2. eq : EqDecider(Point(l))
3. s : fset(Point(l))
4. x : Point(l)
5. ∀[x:Point(l)]. /\(s) ≤ x supposing x ∈ s
6. ¬x ∈ s
7. x@0 : Point(l)
8. x@0 ∈ fset-add(eq;x;s)
⊢ /\(fset-add(eq;x;s)) ≤ x@0
Latex:
Latex:
1. l : BoundedLattice
2. eq : EqDecider(Point(l))
\mvdash{} \mforall{}s:fset(Point(l)). \mforall{}[x:Point(l)]. /\mbackslash{}(s) \mleq{} x supposing x \mmember{} s
By
Latex:
(UsingVars [`eq'] (BLemma `fset-induction`)\mcdot{} THEN Auto THEN Reduce (-1) THEN Auto)
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