Step
*
1
2
1
2
1
of Lemma
lattice-fset-join-is-lub
1. l : BoundedLattice
2. eq : EqDecider(Point(l))
3. s : fset(Point(l))
4. x : Point(l)
5. ∀[x:Point(l)]. x ≤ \/(s) supposing x ∈ s
6. ¬x ∈ s
7. x@0 : Point(l)
8. x@0 ∈ s
⊢ \/(s) ≤ x ∨ \/(s)
BY
{ (InstLemma `lattice-join-is-lub` [⌜l⌝]⋅ THEN Auto) }
Latex:
Latex:
1. l : BoundedLattice
2. eq : EqDecider(Point(l))
3. s : fset(Point(l))
4. x : Point(l)
5. \mforall{}[x:Point(l)]. x \mleq{} \mbackslash{}/(s) supposing x \mmember{} s
6. \mneg{}x \mmember{} s
7. x@0 : Point(l)
8. x@0 \mmember{} s
\mvdash{} \mbackslash{}/(s) \mleq{} x \mvee{} \mbackslash{}/(s)
By
Latex:
(InstLemma `lattice-join-is-lub` [\mkleeneopen{}l\mkleeneclose{}]\mcdot{} THEN Auto)
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