Step
*
1
of Lemma
fset-minimals-singleton
1. T : Type
2. eq : EqDecider(T)
3. x : fset(T)
4. a : fset(T)
5. a = x ∈ fset(T)
⊢ fset-all({x};ys.¬bf-proper-subset-dec(eq;ys;a))
BY
{ (Using [`eq',⌜deq-fset(eq)⌝] (BLemma `fset-all-iff`)⋅ THEN Auto) }
1
1. T : Type
2. eq : EqDecider(T)
3. x : fset(T)
4. a : fset(T)
5. a = x ∈ fset(T)
6. ys : fset(T)
7. ys ∈ {x}
⊢ ¬ys ⊆≠ a
Latex:
Latex:
1. T : Type
2. eq : EqDecider(T)
3. x : fset(T)
4. a : fset(T)
5. a = x
\mvdash{} fset-all(\{x\};ys.\mneg{}\msubb{}f-proper-subset-dec(eq;ys;a))
By
Latex:
(Using [`eq',\mkleeneopen{}deq-fset(eq)\mkleeneclose{}] (BLemma `fset-all-iff`)\mcdot{} THEN Auto)
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