Step
*
1
1
1
of Lemma
multiply_nat_plus_iff
1. i : ℤ
2. 0 < i
3. x : ℤ
4. (i * x) = (i * x) ∈ ℤ
5. (i * x) ≥ 0
⊢ 0 ≤ x
BY
{ SupposeNot }
1
1. i : ℤ
2. 0 < i
3. x : ℤ
4. (i * x) = (i * x) ∈ ℤ
5. (i * x) ≥ 0
6. ¬(0 ≤ x)
⊢ 0 ≤ x
Latex:
Latex:
1. i : \mBbbZ{}
2. 0 < i
3. x : \mBbbZ{}
4. (i * x) = (i * x)
5. (i * x) \mgeq{} 0
\mvdash{} 0 \mleq{} x
By
Latex:
SupposeNot
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