Step
*
1
3
2
2
of Lemma
qabs-difference-qmax
1. a : ℚ
2. b : ℚ
3. c : ℚ
4. d : ℚ
5. b ≤ a
6. c ≤ a
7. d ≤ a
8. b < a
9. c ≤ d
10. |a - c| ≤ |b - d|
11. (a - d) ≤ 0
⊢ -(d - d) ≤ |b - d|
BY
{ (QNorm 0 THEN BLemma `zero-qle-qabs` THEN Auto) }
Latex:
Latex:
1. a : \mBbbQ{}
2. b : \mBbbQ{}
3. c : \mBbbQ{}
4. d : \mBbbQ{}
5. b \mleq{} a
6. c \mleq{} a
7. d \mleq{} a
8. b < a
9. c \mleq{} d
10. |a - c| \mleq{} |b - d|
11. (a - d) \mleq{} 0
\mvdash{} -(d - d) \mleq{} |b - d|
By
Latex:
(QNorm 0 THEN BLemma `zero-qle-qabs` THEN Auto)
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