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Step * 2 1 of Lemma partial-not-exception

.....subterm..... T:t
1:n
1. T : Type
2. x : Base
3. x1 : Base
4. x = x1 ∈ pertype(λx,y. ((x ∈ base-partial(T)) ∧ (y ∈ base-partial(T)) ∧ per-partial(T;x;y)))
5. x ∈ base-partial(T)
6. x1 ∈ base-partial(T)
7. per-partial(T;x;x1)
8. x2 : is-exception(x)@i
⊢ x2 = x2 ∈ False
BY
{ TACTIC:(InstLemma  `base-partial-not-exception` [⌜T⌝;⌜x⌝]⋅ THEN Auto) }

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Latex:

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Latex:
.....subterm.....  T:t
1:n
1.  T  :  Type
2.  x  :  Base
3.  x1  :  Base
4.  x  =  x1
5.  x  \mmember{}  base-partial(T)
6.  x1  \mmember{}  base-partial(T)
7.  per-partial(T;x;x1)
8.  x2  :  is-exception(x)@i
\mvdash{}  x2  =  x2


By

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Latex:
TACTIC:(InstLemma    `base-partial-not-exception`  [\mkleeneopen{}T\mkleeneclose{};\mkleeneopen{}x\mkleeneclose{}]\mcdot{}  THEN  Auto)

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