Step
*
2
1
1
1
of Lemma
Legendre-rpolynomial
1. n : {1...}
2. ¬(n = 0 ∈ ℤ)
3. ¬(n = 1 ∈ ℤ)
4. a : ℕ(n - 2) + 1 ⟶ ℝ
5. ∀x:ℝ. (Legendre(n - 2;x) = (Σi≤n - 2. a_i * x^i))
6. (a (n - 2)) = (r(doublefact((2 * (n - 2)) - 1))/r((n - 2)!))
7. b : ℕ(n - 1) + 1 ⟶ ℝ
8. ∀x:ℝ. (Legendre(n - 1;x) = (Σi≤n - 1. b_i * x^i))
9. (b (n - 1)) = (r(doublefact((2 * (n - 1)) - 1))/r((n - 1)!))
10. ∀x:ℝ
(((2 * n) - 1 * x * Legendre(n - 1;x) - n - 1 * Legendre(n - 2;x))/n
= (Σi≤n. λi.if (i =z 0) then (1 - n * a i)/n
if i <z n - 1 then ((2 * n) - 1 * b (i - 1))/n - (n - 1 * a i)/n
else ((2 * n) - 1 * b (i - 1))/n
fi _i * x^i))
11. r((n)!) ≠ r0
12. r((n - 1)!) ≠ r0
⊢ ((r((2 * n) - 1) * (r(doublefact((2 * (n - 1)) - 1))/r((n - 1)!))) * r((n - 1)! * n)) = r(doublefact((2 * n) - 1) * n)
BY
{ ((RWO "rmul-int<" 0 THENA Auto)
THEN MoveToConcl (-1)
THEN (GenConclTerm ⌜r((n - 1)!)⌝⋅ THENA Auto)
THEN (Subst' (2 * (n - 1)) - 1 ~ (2 * n) - 1 - 2 0 THENA Auto)
THEN (GenConcl ⌜((2 * n) - 1) = m ∈ ℕ+⌝⋅ THENA Auto)) }
1
1. n : {1...}
2. ¬(n = 0 ∈ ℤ)
3. ¬(n = 1 ∈ ℤ)
4. a : ℕ(n - 2) + 1 ⟶ ℝ
5. ∀x:ℝ. (Legendre(n - 2;x) = (Σi≤n - 2. a_i * x^i))
6. (a (n - 2)) = (r(doublefact((2 * (n - 2)) - 1))/r((n - 2)!))
7. b : ℕ(n - 1) + 1 ⟶ ℝ
8. ∀x:ℝ. (Legendre(n - 1;x) = (Σi≤n - 1. b_i * x^i))
9. (b (n - 1)) = (r(doublefact((2 * (n - 1)) - 1))/r((n - 1)!))
10. ∀x:ℝ
(((2 * n) - 1 * x * Legendre(n - 1;x) - n - 1 * Legendre(n - 2;x))/n
= (Σi≤n. λi.if (i =z 0) then (1 - n * a i)/n
if i <z n - 1 then ((2 * n) - 1 * b (i - 1))/n - (n - 1 * a i)/n
else ((2 * n) - 1 * b (i - 1))/n
fi _i * x^i))
11. r((n)!) ≠ r0
12. v : ℝ
13. r((n - 1)!) = v ∈ ℝ
14. m : ℕ+
15. ((2 * n) - 1) = m ∈ ℕ+
⊢ v ≠ r0
⇒ (((r(m) * (r(doublefact(m - 2))/v)) * v * r(n)) = (r(doublefact(m)) * r(n)))
Latex:
Latex:
1. n : \{1...\}
2. \mneg{}(n = 0)
3. \mneg{}(n = 1)
4. a : \mBbbN{}(n - 2) + 1 {}\mrightarrow{} \mBbbR{}
5. \mforall{}x:\mBbbR{}. (Legendre(n - 2;x) = (\mSigma{}i\mleq{}n - 2. a\_i * x\^{}i))
6. (a (n - 2)) = (r(doublefact((2 * (n - 2)) - 1))/r((n - 2)!))
7. b : \mBbbN{}(n - 1) + 1 {}\mrightarrow{} \mBbbR{}
8. \mforall{}x:\mBbbR{}. (Legendre(n - 1;x) = (\mSigma{}i\mleq{}n - 1. b\_i * x\^{}i))
9. (b (n - 1)) = (r(doublefact((2 * (n - 1)) - 1))/r((n - 1)!))
10. \mforall{}x:\mBbbR{}
(((2 * n) - 1 * x * Legendre(n - 1;x) - n - 1 * Legendre(n - 2;x))/n
= (\mSigma{}i\mleq{}n. \mlambda{}i.if (i =\msubz{} 0) then (1 - n * a i)/n
if i <z n - 1 then ((2 * n) - 1 * b (i - 1))/n - (n - 1 * a i)/n
else ((2 * n) - 1 * b (i - 1))/n
fi \_i * x\^{}i))
11. r((n)!) \mneq{} r0
12. r((n - 1)!) \mneq{} r0
\mvdash{} ((r((2 * n) - 1) * (r(doublefact((2 * (n - 1)) - 1))/r((n - 1)!))) * r((n - 1)! * n))
= r(doublefact((2 * n) - 1) * n)
By
Latex:
((RWO "rmul-int<" 0 THENA Auto)
THEN MoveToConcl (-1)
THEN (GenConclTerm \mkleeneopen{}r((n - 1)!)\mkleeneclose{}\mcdot{} THENA Auto)
THEN (Subst' (2 * (n - 1)) - 1 \msim{} (2 * n) - 1 - 2 0 THENA Auto)
THEN (GenConcl \mkleeneopen{}((2 * n) - 1) = m\mkleeneclose{}\mcdot{} THENA Auto))
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