Step
*
1
1
4
of Lemma
near-log-exists
1. a : {a:ℝ| r1 ≤ a}
2. N : ℕ+
3. b : ℕ+
4. a ≤ r(b)
5. r1 ≤ a
6. r0 < r1
7. (r1 + r(b)) ≤ e^r(b)
8. c : {2...}
9. e^r(b) ≤ r(c)
10. M : {2...}
11. M = (N * c) ∈ {2...}
12. ∃c:ℤ. (∃j:ℕ+ [((|real_exp((r(c))/j) - a| ≤ (r1/r(N))) ∧ ((r0)/1 ≤ (r(c))/j) ∧ ((r(c))/j ≤ (r(b))/1))])
⊢ ∃m:ℕ+. (∃z:ℤ [(|(r(z))/m - rlog(a)| ≤ (r1/r(N)))])
BY
{ (ExRepD
THEN (InstConcl [⌜j⌝;⌜c1⌝]⋅ THENA Auto)
THEN (Assert (r(c1))/j = rlog(e^(r(c1))/j) BY
(RWO "rlog-rexp" 0 THEN Auto))) }
1
1. a : {a:ℝ| r1 ≤ a}
2. N : ℕ+
3. b : ℕ+
4. a ≤ r(b)
5. r1 ≤ a
6. r0 < r1
7. (r1 + r(b)) ≤ e^r(b)
8. c : {2...}
9. e^r(b) ≤ r(c)
10. M : {2...}
11. M = (N * c) ∈ {2...}
12. c1 : ℤ
13. j : ℕ+
14. |real_exp((r(c1))/j) - a| ≤ (r1/r(N))
15. (r0)/1 ≤ (r(c1))/j
16. (r(c1))/j ≤ (r(b))/1
17. (r(c1))/j = rlog(e^(r(c1))/j)
⊢ |(r(c1))/j - rlog(a)| ≤ (r1/r(N))
Latex:
Latex:
1. a : \{a:\mBbbR{}| r1 \mleq{} a\}
2. N : \mBbbN{}\msupplus{}
3. b : \mBbbN{}\msupplus{}
4. a \mleq{} r(b)
5. r1 \mleq{} a
6. r0 < r1
7. (r1 + r(b)) \mleq{} e\^{}r(b)
8. c : \{2...\}
9. e\^{}r(b) \mleq{} r(c)
10. M : \{2...\}
11. M = (N * c)
12. \mexists{}c:\mBbbZ{}
(\mexists{}j:\mBbbN{}\msupplus{} [((|real\_exp((r(c))/j) - a| \mleq{} (r1/r(N)))
\mwedge{} ((r0)/1 \mleq{} (r(c))/j)
\mwedge{} ((r(c))/j \mleq{} (r(b))/1))])
\mvdash{} \mexists{}m:\mBbbN{}\msupplus{}. (\mexists{}z:\mBbbZ{} [(|(r(z))/m - rlog(a)| \mleq{} (r1/r(N)))])
By
Latex:
(ExRepD
THEN (InstConcl [\mkleeneopen{}j\mkleeneclose{};\mkleeneopen{}c1\mkleeneclose{}]\mcdot{} THENA Auto)
THEN (Assert (r(c1))/j = rlog(e\^{}(r(c1))/j) BY
(RWO "rlog-rexp" 0 THEN Auto)))
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