Step
*
1
1
of Lemma
qmul-qdiv-cancel5
1. a : ℚ
2. b : ℚ
3. c : ℚ
4. ¬(a = 0 ∈ ℚ)
5. ¬(c = 0 ∈ ℚ)
6. (a * c) = 0 ∈ ℚ
⊢ False
BY
{ (QMul ⌜(1/c)⌝ (-1)⋅ THEN Auto) }
Latex:
Latex:
1. a : \mBbbQ{}
2. b : \mBbbQ{}
3. c : \mBbbQ{}
4. \mneg{}(a = 0)
5. \mneg{}(c = 0)
6. (a * c) = 0
\mvdash{} False
By
Latex:
(QMul \mkleeneopen{}(1/c)\mkleeneclose{} (-1)\mcdot{} THEN Auto)
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