Step
*
3
1
of Lemma
absval_lbound
1. i : ℤ
2. ¬0 < i
3. n : ℕ
4. i < -n
⊢ n < -i
BY
{ (Add ⌜n - i⌝ (-1)⋅ THEN RW IntNormC (-1) THEN Auto) }
Latex:
Latex:
1. i : \mBbbZ{}
2. \mneg{}0 < i
3. n : \mBbbN{}
4. i < -n
\mvdash{} n < -i
By
Latex:
(Add \mkleeneopen{}n - i\mkleeneclose{} (-1)\mcdot{} THEN RW IntNormC (-1) THEN Auto)
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