Step
*
of Lemma
fix-not-exception
∀[G,g:Base]. ¬is-exception(G fix(g)) supposing ∀j:ℕ. (¬is-exception(G (g^j ⊥)))
BY
{ (Auto
THEN (D 0 THENA Auto)
THEN Unfold `is-exception` -1
THEN ExceptionCompactness (-1)
THEN Unhide
THEN Fold `is-exception` (-1)
THEN InstHyp [⌜j⌝] 3⋅
THEN Auto) }
Latex:
Latex:
\mforall{}[G,g:Base]. \mneg{}is-exception(G fix(g)) supposing \mforall{}j:\mBbbN{}. (\mneg{}is-exception(G (g\^{}j \mbot{})))
By
Latex:
(Auto
THEN (D 0 THENA Auto)
THEN Unfold `is-exception` -1
THEN ExceptionCompactness (-1)
THEN Unhide
THEN Fold `is-exception` (-1)
THEN InstHyp [\mkleeneopen{}j\mkleeneclose{}] 3\mcdot{}
THEN Auto)
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