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Step * 2 2 of Lemma eq_int-wf-partial


1. x : partial(Base)
2. y : partial(Base)
3. is-exception(if x=y  then tt  else ff)
4. x ∈ ℤ
5. is-exception(y)
⊢ ↓False
BY
{ (InstLemma `partial-not-exception` [⌜Base⌝;⌜y⌝]⋅ THEN Auto) }

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Latex:

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Latex:

1.  x  :  partial(Base)
2.  y  :  partial(Base)
3.  is-exception(if  x=y    then  tt    else  ff)
4.  x  \mmember{}  \mBbbZ{}
5.  is-exception(y)
\mvdash{}  \mdownarrow{}False


By

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Latex:
(InstLemma  `partial-not-exception`  [\mkleeneopen{}Base\mkleeneclose{};\mkleeneopen{}y\mkleeneclose{}]\mcdot{}  THEN  Auto)

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