Step
*
1
of Lemma
face-map-property
1. [L] : Cname List
2. x : Cname
3. p : ℕ2
4. y : nameset([x / L])
5. y = x ∈ ℤ
⊢ ((↑isname(p))
⇒ ((¬(x = x ∈ Cname)) ∧ (p = x ∈ nameset(L)))) ∧ ((¬↑isname(p))
⇒ ((x = x ∈ Cname) ∧ (p = p ∈ ℕ2)))
BY
{ (Subst' isname(p) ~ ff 0 THEN Reduce 0 THEN Auto) }
1
1. L : Cname List
2. x : Cname
3. p : ℕ2
4. y : nameset([x / L])
5. y = x ∈ ℤ
⊢ isname(p) = ff
Latex:
Latex:
1. [L] : Cname List
2. x : Cname
3. p : \mBbbN{}2
4. y : nameset([x / L])
5. y = x
\mvdash{} ((\muparrow{}isname(p)) {}\mRightarrow{} ((\mneg{}(x = x)) \mwedge{} (p = x))) \mwedge{} ((\mneg{}\muparrow{}isname(p)) {}\mRightarrow{} ((x = x) \mwedge{} (p = p)))
By
Latex:
(Subst' isname(p) \msim{} ff 0 THEN Reduce 0 THEN Auto)
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