Step
*
1
of Lemma
qexp-convex
1. a : ℚ@i
2. b : ℚ@i
3. 0 ≤ b@i
4. b ≤ a@i
5. n : ℤ@i
6. 0 < n
⊢ (2 * b ↑ n * b) ≤ ((b ↑ n * a) + (a ↑ n * b))
BY
{ ((InstLemma `qexp_preserves_qle` [⌜b⌝;⌜a⌝;⌜n⌝]⋅ THENA Auto)
THEN (QMul ⌜b⌝ (-1)⋅ THENA Auto)
THEN RWO "-1<" 0
THEN Auto
THEN QAdd ⌜-(b ↑ n * b)⌝ 0⋅
THEN Auto
THEN (InstLemma `qmul_preserves_qle2` [⌜b⌝;⌜a⌝;⌜b ↑ n⌝]⋅ THEN Auto)⋅)⋅ }
Latex:
Latex:
1. a : \mBbbQ{}@i
2. b : \mBbbQ{}@i
3. 0 \mleq{} b@i
4. b \mleq{} a@i
5. n : \mBbbZ{}@i
6. 0 < n
\mvdash{} (2 * b \muparrow{} n * b) \mleq{} ((b \muparrow{} n * a) + (a \muparrow{} n * b))
By
Latex:
((InstLemma `qexp\_preserves\_qle` [\mkleeneopen{}b\mkleeneclose{};\mkleeneopen{}a\mkleeneclose{};\mkleeneopen{}n\mkleeneclose{}]\mcdot{} THENA Auto)
THEN (QMul \mkleeneopen{}b\mkleeneclose{} (-1)\mcdot{} THENA Auto)
THEN RWO "-1<" 0
THEN Auto
THEN QAdd \mkleeneopen{}-(b \muparrow{} n * b)\mkleeneclose{} 0\mcdot{}
THEN Auto
THEN (InstLemma `qmul\_preserves\_qle2` [\mkleeneopen{}b\mkleeneclose{};\mkleeneopen{}a\mkleeneclose{};\mkleeneopen{}b \muparrow{} n\mkleeneclose{}]\mcdot{} THEN Auto)\mcdot{})\mcdot{}
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