Step
*
2
1
1
of Lemma
qabs-non-zero
1. q : ℚ
2. ¬(q = 0 ∈ ℚ)
3. 0 = |q| ∈ ℚ
⊢ 0 < |q|
BY
{ D 2 }
1
1. q : ℚ
2. 0 = |q| ∈ ℚ
⊢ q = 0 ∈ ℚ
Latex:
Latex:
1. q : \mBbbQ{}
2. \mneg{}(q = 0)
3. 0 = |q|
\mvdash{} 0 < |q|
By
Latex:
D 2
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