Step
*
of Lemma
q-geometric-series-converges
No Annotations
∀a:{a:ℚ| |a| < 1} . ∀e:{e:ℚ| 0 < e ∧ (e ≤ 1)} . ∃n:ℕ. ∀m:ℕ. ((n ≤ m)
⇒ |Σ0 ≤ i < m. a ↑ i - (1/1 - a)| < e)
BY
{ ((Auto
THEN (Assert ¬((1 - a) = 0 ∈ ℚ) BY
((D 0 THENA Auto) THEN QAdd ⌜a⌝ (-1)⋅ THEN DVar `a' THEN Eliminate ⌜a⌝⋅ THEN Auto))
)
THEN (Assert |a| ∈ {q:ℚ| (0 ≤ q) ∧ q < 1} BY
Auto)
THEN (Evaluate ⌜e' = (|1 - a| * e) ∈ {e:ℚ| 0 < e} ⌝⋅ THENA Auto)) }
1
.....wf.....
1. a : {a:ℚ| |a| < 1}
2. e : {e:ℚ| 0 < e ∧ (e ≤ 1)}
3. ¬((1 - a) = 0 ∈ ℚ)
4. |a| ∈ {q:ℚ| (0 ≤ q) ∧ q < 1}
5. {e:ℚ| 0 < e} ∈ ℙ{[1 | i 0]}
⊢ |1 - a| * e ∈ {e:ℚ| 0 < e}
2
1. a : {a:ℚ| |a| < 1}
2. e : {e:ℚ| 0 < e ∧ (e ≤ 1)}
3. ¬((1 - a) = 0 ∈ ℚ)
4. |a| ∈ {q:ℚ| (0 ≤ q) ∧ q < 1}
5. e' : {e:ℚ| 0 < e}
6. e' = (|1 - a| * e) ∈ {e:ℚ| 0 < e}
⊢ ∃n:ℕ. ∀m:ℕ. ((n ≤ m)
⇒ |Σ0 ≤ i < m. a ↑ i - (1/1 - a)| < e)
Latex:
Latex:
No Annotations
\mforall{}a:\{a:\mBbbQ{}| |a| < 1\} . \mforall{}e:\{e:\mBbbQ{}| 0 < e \mwedge{} (e \mleq{} 1)\} .
\mexists{}n:\mBbbN{}. \mforall{}m:\mBbbN{}. ((n \mleq{} m) {}\mRightarrow{} |\mSigma{}0 \mleq{} i < m. a \muparrow{} i - (1/1 - a)| < e)
By
Latex:
((Auto
THEN (Assert \mneg{}((1 - a) = 0) BY
((D 0 THENA Auto) THEN QAdd \mkleeneopen{}a\mkleeneclose{} (-1)\mcdot{} THEN DVar `a' THEN Eliminate \mkleeneopen{}a\mkleeneclose{}\mcdot{} THEN Auto))
)
THEN (Assert |a| \mmember{} \{q:\mBbbQ{}| (0 \mleq{} q) \mwedge{} q < 1\} BY
Auto)
THEN (Evaluate \mkleeneopen{}e' = (|1 - a| * e)\mkleeneclose{}\mcdot{} THENA Auto))
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