Step
*
1
1
1
2
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 ∈ ⋃x∈a.setTC(x))
8. x1 : Set{i:l}
9. (x1 ∈ a)
10. (x ∈ setTC(x1))
⊢ (x ∈ setTC(f"(T)))
BY
{ (Assert (x1 ∈ f"(T)) BY
(RWO "setsubset-iff" 5 THEN Auto)) }
1
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 ∈ ⋃x∈a.setTC(x))
8. x1 : Set{i:l}
9. (x1 ∈ a)
10. (x ∈ setTC(x1))
11. (x1 ∈ f"(T))
⊢ (x ∈ setTC(f"(T)))
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{} \mcup{}x\mmember{}a.setTC(x))
8. x1 : Set\{i:l\}
9. (x1 \mmember{} a)
10. (x \mmember{} setTC(x1))
\mvdash{} (x \mmember{} setTC(f"(T)))
By
Latex:
(Assert (x1 \mmember{} f"(T)) BY
(RWO "setsubset-iff" 5 THEN Auto))
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