Step
*
2
1
of Lemma
absval_cases
1. x : ℤ
2. y : ℕ
3. x = y ∈ ℤ
⊢ |y| = y ∈ ℤ
BY
{ (RWO "absval_pos" 0 THEN Auto) }
Latex:
Latex:
1. x : \mBbbZ{}
2. y : \mBbbN{}
3. x = y
\mvdash{} |y| = y
By
Latex:
(RWO "absval\_pos" 0 THEN Auto)
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