Step
*
1
1
1
1
of Lemma
setTC_functionality_subset
1. T : Type
2. f : T ⟶ Set{i:l}
3. ∀t:T. ∀a:Set{i:l}. ((a ⊆ f[t])
⇒ (setTC(a) ⊆ setTC(f[t])))
4. a : Set{i:l}
5. (a ⊆ f"(T))
6. x : Set{i:l}
7. (x ∈ a)
⊢ (x ∈ setTC(f"(T)))
BY
{ ((RWO "setsubset-iff" (-3) THENA Auto) THEN Unfold `setTC` 0 THEN (RW SetMemC 0 THENA Auto) THEN OrLeft THEN Auto) }
Latex:
Latex:
1. T : Type
2. f : T {}\mrightarrow{} Set\{i:l\}
3. \mforall{}t:T. \mforall{}a:Set\{i:l\}. ((a \msubseteq{} f[t]) {}\mRightarrow{} (setTC(a) \msubseteq{} setTC(f[t])))
4. a : Set\{i:l\}
5. (a \msubseteq{} f"(T))
6. x : Set\{i:l\}
7. (x \mmember{} a)
\mvdash{} (x \mmember{} setTC(f"(T)))
By
Latex:
((RWO "setsubset-iff" (-3) THENA Auto)
THEN Unfold `setTC` 0
THEN (RW SetMemC 0 THENA Auto)
THEN OrLeft
THEN Auto)
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