Step
*
of Lemma
assert-exception-name
∀[n:Atom2]. ∀[t:Value() ⋃ Exception(n;Top)].
(t ∈ Exception(n;Top) supposing ↑exception-name(t;n) ∧ t ∈ Value() supposing ¬↑exception-name(t;n))
BY
{ (Auto THEN D_b_union 2 THEN Try (Declaration)) }
1
1. n : Atom2
2. a1 : Value()
3. ↑exception-name(a1;n)
⊢ a1 ∈ Exception(n;Top)
2
1. n : Atom2
2. a1 : Exception(n;Top)
3. a1 ∈ Exception(n;Top) supposing ↑exception-name(a1;n)
4. ¬↑exception-name(a1;n)
⊢ a1 ∈ Value()
Latex:
Latex:
\mforall{}[n:Atom2]. \mforall{}[t:Value() \mcup{} Exception(n;Top)].
(t \mmember{} Exception(n;Top) supposing \muparrow{}exception-name(t;n)
\mwedge{} t \mmember{} Value() supposing \mneg{}\muparrow{}exception-name(t;n))
By
Latex:
(Auto THEN D\_b\_union 2 THEN Try (Declaration))
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