Step
*
of Lemma
test-evd1
∀[A,B,C,D,E:ℙ]. ((((A ∧ B)
⇒ (A ∧ B))
⇒ (C ∨ D))
⇒ (C
⇒ E)
⇒ (D
⇒ E)
⇒ E)
BY
{ (EvidenceTac ⌜λh,f,g. (case h (λx.x) of inl(a) => f | inr(b) => g
case h (λp.let x,y = p in <x, y>) of inl(c) => c | inr(d) => d)⌝⋅
THENA Auto
) }
Latex:
Latex:
\mforall{}[A,B,C,D,E:\mBbbP{}]. ((((A \mwedge{} B) {}\mRightarrow{} (A \mwedge{} B)) {}\mRightarrow{} (C \mvee{} D)) {}\mRightarrow{} (C {}\mRightarrow{} E) {}\mRightarrow{} (D {}\mRightarrow{} E) {}\mRightarrow{} E)
By
Latex:
(EvidenceTac \mkleeneopen{}\mlambda{}h,f,g. (case h (\mlambda{}x.x) of inl(a) => f | inr(b) => g
case h (\mlambda{}p.let x,y = p in <x, y>) of inl(c) => c | inr(d) => d)\mkleeneclose{}\mcdot{}
THENA Auto
)
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