Step
*
2
1
1
of Lemma
fpf-compatible-single-iff
.....antecedent.....
1. A : Type
2. eq : EqDecider(A)
3. B : A ─→ Type
4. f : a:A fp-> B[a]
5. x : A
6. v : B[x]
7. x@0 : A@i
8. ↑x@0 ∈ dom(f)@i
9. x = x@0 ∈ A
⊢ ↑x ∈ dom(f)
BY
{ ((HypSubst (-1) 0) THEN Auto) }
Latex:
.....antecedent.....
1. A : Type
2. eq : EqDecider(A)
3. B : A {}\mrightarrow{} Type
4. f : a:A fp-> B[a]
5. x : A
6. v : B[x]
7. x@0 : A@i
8. \muparrow{}x@0 \mmember{} dom(f)@i
9. x = x@0
\mvdash{} \muparrow{}x \mmember{} dom(f)
By
((HypSubst (-1) 0) THEN Auto)
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