Step
*
1
2
of Lemma
bdd-diff-iff-eventual
1. f : ℕ+ ⟶ ℤ
2. g : ℕ+ ⟶ ℤ
3. m : ℕ+
4. B : ℕ
5. ∀n:{m...}. (|(f n) - g n| ≤ B)
6. ¬(m = 1 ∈ ℤ)
⊢ bdd-diff(f;g)
BY
{ (With ⌜imax(B;imax-list(map(λn.|(f n) - g n|;[1, m))))⌝ (D 0)⋅
THEN Auto
THEN (BLemma `imax_ub` THENA Auto)
THEN ((Decide ⌜m ≤ n⌝⋅ THENA Auto) THENL [OrLeft; OrRight])
THEN Auto)⋅ }
1
1. f : ℕ+ ⟶ ℤ
2. g : ℕ+ ⟶ ℤ
3. m : ℕ+
4. B : ℕ
5. ∀n:{m...}. (|(f n) - g n| ≤ B)
6. ¬(m = 1 ∈ ℤ)
7. n : ℕ+
8. ¬(m ≤ n)
⊢ |(f n) - g n| ≤ imax-list(map(λn.|(f n) - g n|;[1, m)))
Latex:
Latex:
1. f : \mBbbN{}\msupplus{} {}\mrightarrow{} \mBbbZ{}
2. g : \mBbbN{}\msupplus{} {}\mrightarrow{} \mBbbZ{}
3. m : \mBbbN{}\msupplus{}
4. B : \mBbbN{}
5. \mforall{}n:\{m...\}. (|(f n) - g n| \mleq{} B)
6. \mneg{}(m = 1)
\mvdash{} bdd-diff(f;g)
By
Latex:
(With \mkleeneopen{}imax(B;imax-list(map(\mlambda{}n.|(f n) - g n|;[1, m))))\mkleeneclose{} (D 0)\mcdot{}
THEN Auto
THEN (BLemma `imax\_ub` THENA Auto)
THEN ((Decide \mkleeneopen{}m \mleq{} n\mkleeneclose{}\mcdot{} THENA Auto) THENL [OrLeft; OrRight])
THEN Auto)\mcdot{}
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