Proof of Theorem fsumconst
| Step | Hyp | Ref
| Expression |
| 1 | | opreq2 3964 |
. . . . . 6
⊢ (j =
M → (M...j) =
(M...M)) |
| 2 | 1 | sumeq1d 6943 |
. . . . 5
⊢ (j =
M → Σk ∈ (M...j)A = Σk
∈ (M...M)A) |
| 3 | | opreq1 3963 |
. . . . . . 7
⊢ (j =
M → (j − M) =
(M − M)) |
| 4 | 3 | opreq1d 3970 |
. . . . . 6
⊢ (j =
M → ((j − M) +
1) = ((M − M) + 1)) |
| 5 | 4 | opreq1d 3970 |
. . . . 5
⊢ (j =
M → (((j − M) +
1) · A) = (((M − M) +
1) · A)) |
| 6 | 2, 5 | eqeq12d 1487 |
. . . 4
⊢ (j =
M → (Σk ∈ (M...j)A = (((j −
M) + 1) · A) ↔ Σk ∈ (M...M)A = (((M −
M) + 1) · A))) |
| 7 | 6 | imbi2d 611 |
. . 3
⊢ (j =
M → ((A ∈ ℂ → Σk ∈ (M...j)A = (((j −
M) + 1) · A)) ↔ (A
∈ ℂ → Σk ∈
(M...M)A =
(((M − M) + 1) · A)))) |
| 8 | | opreq2 3964 |
. . . . . 6
⊢ (j =
m → (M...j) =
(M...m)) |
| 9 | 8 | sumeq1d 6943 |
. . . . 5
⊢ (j =
m → Σk ∈ (M...j)A = Σk
∈ (M...m)A) |
| 10 | | opreq1 3963 |
. . . . . . 7
⊢ (j =
m → (j − M) =
(m − M)) |
| 11 | 10 | opreq1d 3970 |
. . . . . 6
⊢ (j =
m → ((j − M) +
1) = ((m − M) + 1)) |
| 12 | 11 | opreq1d 3970 |
. . . . 5
⊢ (j =
m → (((j − M) +
1) · A) = (((m − M) +
1) · A)) |
| 13 | 9, 12 | eqeq12d 1487 |
. . . 4
⊢ (j =
m → (Σk ∈ (M...j)A = (((j −
M) + 1) · A) ↔ Σk ∈ (M...m)A = (((m −
M) + 1) · A))) |
| 14 | 13 | imbi2d 611 |
. . 3
⊢ (j =
m → ((A ∈ ℂ → Σk ∈ (M...j)A = (((j −
M) + 1) · A)) ↔ (A
∈ ℂ → Σk ∈
(M...m)A =
(((m − M) + 1) · A)))) |
| 15 | | opreq2 3964 |
. . . . . 6
⊢ (j =
(m + 1) → (M...j) =
(M...(m
+ 1))) |
| 16 | 15 | sumeq1d 6943 |
. . . . 5
⊢ (j =
(m + 1) → Σk ∈ (M...j)A = Σk
∈ (M...(m + 1))A) |
| 17 | | opreq1 3963 |
. . . . . . 7
⊢ (j =
(m + 1) → (j − M) =
((m + 1) − M)) |
| 18 | 17 | opreq1d 3970 |
. . . . . 6
⊢ (j =
(m + 1) → ((j − M) +
1) = (((m + 1) − M) + 1)) |
| 19 | 18 | opreq1d 3970 |
. . . . 5
⊢ (j =
(m + 1) → (((j − M) +
1) · A) = ((((m + 1) − M) + 1) · A)) |
| 20 | 16, 19 | eqeq12d 1487 |
. . . 4
⊢ (j =
(m + 1) → (Σk ∈ (M...j)A = (((j −
M) + 1) · A) ↔ Σk ∈ (M...(m +
1))A = ((((m + 1) − M) + 1) · A))) |
| 21 | 20 | imbi2d 611 |
. . 3
⊢ (j =
(m + 1) → ((A ∈ ℂ → Σk ∈ (M...j)A = (((j −
M) + 1) · A)) ↔ (A
∈ ℂ → Σk ∈
(M...(m
+ 1))A = ((((m + 1) − M) + 1) · A)))) |
| 22 | | opreq2 3964 |
. . . . . 6
⊢ (j =
N → (M...j) =
(M...N)) |
| 23 | 22 | sumeq1d 6943 |
. . . . 5
⊢ (j =
N → Σk ∈ (M...j)A = Σk
∈ (M...N)A) |
| 24 | | opreq1 3963 |
. . . . . . 7
⊢ (j =
N → (j − M) =
(N − M)) |
| 25 | 24 | opreq1d 3970 |
. . . . . 6
⊢ (j =
N → ((j − M) +
1) = ((N − M) + 1)) |
| 26 | 25 | opreq1d 3970 |
. . . . 5
⊢ (j =
N → (((j − M) +
1) · A) = (((N − M) +
1) · A)) |
| 27 | 23, 26 | eqeq12d 1487 |
. . . 4
⊢ (j =
N → (Σk ∈ (M...j)A = (((j −
M) + 1) · A) ↔ Σk ∈ (M...N)A = (((N −
M) + 1) · A))) |
| 28 | 27 | imbi2d 611 |
. . 3
⊢ (j =
N → ((A ∈ ℂ → Σk ∈ (M...j)A = (((j −
M) + 1) · A)) ↔ (A
∈ ℂ → Σk ∈
(M...N)A =
(((N − M) + 1) · A)))) |
| 29 | | eqid 1474 |
. . . . . . . 8
⊢ A =
A |
| 30 | 29 | a1i 8 |
. . . . . . 7
⊢ (k =
M → A = A) |
| 31 | 30 | fsum1 6958 |
. . . . . 6
⊢ ((A
∈ ℂ ⋀ M ∈ ℤ)
→ Σk ∈ (M...M)A = A) |
| 32 | 31 | ancoms 436 |
. . . . 5
⊢ ((M
∈ ℤ ⋀ A ∈ ℂ)
→ Σk ∈ (M...M)A = A) |
| 33 | | subidt 5378 |
. . . . . . . . . 10
⊢ (M
∈ ℂ → (M − M) = 0) |
| 34 | 33 | opreq1d 3970 |
. . . . . . . . 9
⊢ (M
∈ ℂ → ((M − M) + 1) = (0 + 1)) |
| 35 | | ax1cn 5252 |
. . . . . . . . . 10
⊢ 1 ∈ ℂ |
| 36 | 35 | addid2 5314 |
. . . . . . . . 9
⊢ (0 + 1) = 1 |
| 37 | 34, 36 | syl6eq 1521 |
. . . . . . . 8
⊢ (M
∈ ℂ → ((M − M) + 1) = 1) |
| 38 | 37 | opreq1d 3970 |
. . . . . . 7
⊢ (M
∈ ℂ → (((M − M) + 1) · A) = (1 · A)) |
| 39 | | mulid2t 5400 |
. . . . . . 7
⊢ (A
∈ ℂ → (1 · A) =
A) |
| 40 | 38, 39 | sylan9eq 1525 |
. . . . . 6
⊢ ((M
∈ ℂ ⋀ A ∈ ℂ)
→ (((M − M) + 1) · A) = A) |
| 41 | | zcnt 6097 |
. . . . . 6
⊢ (M
∈ ℤ → M ∈
ℂ) |
| 42 | 40, 41 | sylan 448 |
. . . . 5
⊢ ((M
∈ ℤ ⋀ A ∈ ℂ)
→ (((M − M) + 1) · A) = A) |
| 43 | 32, 42 | eqtr4d 1508 |
. . . 4
⊢ ((M
∈ ℤ ⋀ A ∈ ℂ)
→ Σk ∈ (M...M)A = (((M −
M) + 1) · A)) |
| 44 | 43 | ex 373 |
. . 3
⊢ (M
∈ ℤ → (A ∈ ℂ
→ Σk ∈ (M...M)A = (((M −
M) + 1) · A))) |
| 45 | | fsump1s 6966 |
. . . . . . . . 9
⊢ ((m
∈ (ℤ≥ ‘M)
⋀ ∀k ∈ (M...(m +
1))A ∈ ℂ) → Σk ∈ (M...(m +
1))A = (Σk ∈ (M...m)A + [(m +
1) / k]A)) |
| 46 | | ax-1 4 |
. . . . . . . . . 10
⊢ (A
∈ ℂ → (k ∈ (M...(m + 1))
→ A ∈ ℂ)) |
| 47 | 46 | r19.21aiv 1711 |
. . . . . . . . 9
⊢ (A
∈ ℂ → ∀k ∈
(M...(m
+ 1))A ∈ ℂ) |
| 48 | 45, 47 | sylan2 451 |
. . . . . . . 8
⊢ ((m
∈ (ℤ≥ ‘M)
⋀ A ∈ ℂ) →
Σk ∈ (M...(m +
1))A = (Σk ∈ (M...m)A + [(m +
1) / k]A)) |
| 49 | | oprex 3978 |
. . . . . . . . . 10
⊢ (m +
1) ∈ V |
| 50 | | ax-17 970 |
. . . . . . . . . . 11
⊢ (j
∈ A → ∀k j ∈
A) |
| 51 | 50 | csbconstgf 2007 |
. . . . . . . . . 10
⊢ ((m +
1) ∈ V → [(m + 1) /
k]A = A) |
| 52 | 49, 51 | ax-mp 7 |
. . . . . . . . 9
⊢ [(m + 1) / k]A =
A |
| 53 | 52 | opreq2i 3967 |
. . . . . . . 8
⊢ (Σk ∈ (M...m)A + [(m +
1) / k]A) = (Σk
∈ (M...m)A + A) |
| 54 | 48, 53 | syl6eq 1521 |
. . . . . . 7
⊢ ((m
∈ (ℤ≥ ‘M)
⋀ A ∈ ℂ) →
Σk ∈ (M...(m +
1))A = (Σk ∈ (M...m)A + A)) |
| 55 | | opreq1 3963 |
. . . . . . 7
⊢ (Σk ∈ (M...m)A = (((m −
M) + 1) · A) → (Σk ∈ (M...m)A + A) =
((((m − M) + 1) · A) + A)) |
| 56 | 54, 55 | sylan9eq 1525 |
. . . . . 6
⊢ (((m
∈ (ℤ≥ ‘M)
⋀ A ∈ ℂ) ⋀
Σk ∈ (M...m)A = (((m −
M) + 1) · A)) → Σk ∈ (M...(m +
1))A = ((((m − M) +
1) · A) + A)) |
| 57 | | addsubt 5367 |
. . . . . . . . . . . . 13
⊢ ((m
∈ ℂ ⋀ 1 ∈ ℂ ⋀ M ∈ ℂ) → ((m + 1) − M) = ((m −
M) + 1)) |
| 58 | 35, 57 | mp3an2 903 |
. . . . . . . . . . . 12
⊢ ((m
∈ ℂ ⋀ M ∈ ℂ)
→ ((m + 1) − M) = ((m −
M) + 1)) |
| 59 | 58 | adantr 389 |
. . . . . . . . . . 11
⊢ (((m
∈ ℂ ⋀ M ∈ ℂ)
⋀ A ∈ ℂ) → ((m + 1) − M) = ((m −
M) + 1)) |
| 60 | 59 | opreq1d 3970 |
. . . . . . . . . 10
⊢ (((m
∈ ℂ ⋀ M ∈ ℂ)
⋀ A ∈ ℂ) →
(((m + 1) − M) + 1) = (((m
− M) + 1) + 1)) |
| 61 | 60 | opreq1d 3970 |
. . . . . . . . 9
⊢ (((m
∈ ℂ ⋀ M ∈ ℂ)
⋀ A ∈ ℂ) →
((((m + 1) − M) + 1) · A) = ((((m
− M) + 1) + 1) · A)) |
| 62 | | adddirt 5302 |
. . . . . . . . . . 11
⊢ ((((m
− M) + 1) ∈ ℂ ⋀ 1
∈ ℂ ⋀ A ∈ ℂ)
→ ((((m − M) + 1) + 1) · A) = ((((m
− M) + 1) · A) + (1 · A))) |
| 63 | 35, 62 | mp3an2 903 |
. . . . . . . . . 10
⊢ ((((m
− M) + 1) ∈ ℂ ⋀
A ∈ ℂ) → ((((m − M) +
1) + 1) · A) = ((((m − M) +
1) · A) + (1 · A))) |
| 64 | | subclt 5350 |
. . . . . . . . . . 11
⊢ ((m
∈ ℂ ⋀ M ∈ ℂ)
→ (m − M) ∈ ℂ) |
| 65 | | peano2cn 5327 |
. . . . . . . . . . 11
⊢ ((m
− M) ∈ ℂ → ((m − M) +
1) ∈ ℂ) |
| 66 | 64, 65 | syl 10 |
. . . . . . . . . 10
⊢ ((m
∈ ℂ ⋀ M ∈ ℂ)
→ ((m − M) + 1) ∈ ℂ) |
| 67 | 63, 66 | sylan 448 |
. . . . . . . . 9
⊢ (((m
∈ ℂ ⋀ M ∈ ℂ)
⋀ A ∈ ℂ) →
((((m − M) + 1) + 1) · A) = ((((m
− M) + 1) · A) + (1 · A))) |
| 68 | 39 | opreq2d 3971 |
. . . . . . . . . 10
⊢ (A
∈ ℂ → ((((m −
M) + 1) · A) + (1 · A)) = ((((m
− M) + 1) · A) + A)) |
| 69 | 68 | adantl 388 |
. . . . . . . . 9
⊢ (((m
∈ ℂ ⋀ M ∈ ℂ)
⋀ A ∈ ℂ) →
((((m − M) + 1) · A) + (1 · A)) = ((((m
− M) + 1) · A) + A)) |
| 70 | 61, 67, 69 | 3eqtrd 1509 |
. . . . . . . 8
⊢ (((m
∈ ℂ ⋀ M ∈ ℂ)
⋀ A ∈ ℂ) →
((((m + 1) − M) + 1) · A) = ((((m
− M) + 1) · A) + A)) |
| 71 | | eluzelz 6368 |
. . . . . . . . . 10
⊢ (m
∈ (ℤ≥ ‘M)
→ m ∈ ℤ) |
| 72 | | zcnt 6097 |
. . . . . . . . . 10
⊢ (m
∈ ℤ → m ∈
ℂ) |
| 73 | 71, 72 | syl 10 |
. . . . . . . . 9
⊢ (m
∈ (ℤ≥ ‘M)
→ m ∈ ℂ) |
| 74 | | eluzel2 6369 |
. . . . . . . . . 10
⊢ (m
∈ (ℤ≥ ‘M)
→ M ∈ ℤ) |
| 75 | 74, 41 | syl 10 |
. . . . . . . . 9
⊢ (m
∈ (ℤ≥ ‘M)
→ M ∈ ℂ) |
| 76 | 73, 75 | jca 288 |
. . . . . . . 8
⊢ (m
∈ (ℤ≥ ‘M)
→ (m ∈ ℂ ⋀ M ∈ ℂ)) |
| 77 | 70, 76 | sylan 448 |
. . . . . . 7
⊢ ((m
∈ (ℤ≥ ‘M)
⋀ A ∈ ℂ) →
((((m + 1) − M) + 1) · A) = ((((m
− M) + 1) · A) + A)) |
| 78 | 77 | adantr 389 |
. . . . . 6
⊢ (((m
∈ (ℤ≥ ‘M)
⋀ A ∈ ℂ) ⋀
Σk ∈ (M...m)A = (((m −
M) + 1) · A)) → ((((m
+ 1) − M) + 1) · A) = ((((m
− M) + 1) · A) + A)) |
| 79 | 56, 78 | eqtr4d 1508 |
. . . . 5
⊢ (((m
∈ (ℤ≥ ‘M)
⋀ A ∈ ℂ) ⋀
Σk ∈ (M...m)A = (((m −
M) + 1) · A)) → Σk ∈ (M...(m +
1))A = ((((m + 1) − M) + 1) · A)) |
| 80 | 79 | exp31 376 |
. . . 4
⊢ (m
∈ (ℤ≥ ‘M)
→ (A ∈ ℂ →
(Σk ∈ (M...m)A = (((m −
M) + 1) · A) → Σk ∈ (M...(m +
1))A = ((((m + 1) − M) + 1) · A)))) |
| 81 | 80 | a2d 13 |
. . 3
⊢ (m
∈ (ℤ≥ ‘M)
→ ((A ∈ ℂ →
Σk ∈ (M...m)A = (((m −
M) + 1) · A)) → (A
∈ ℂ → Σk ∈
(M...(m
+ 1))A = ((((m + 1) − M) + 1) · A)))) |
| 82 | 7, 14, 21, 28, 44, 81 | uzind4 6395 |
. 2
⊢ (N
∈ (ℤ≥ ‘M)
→ (A ∈ ℂ →
Σk ∈ (M...N)A = (((N −
M) + 1) · A))) |
| 83 | 82 | imp 350 |
1
⊢ ((N
∈ (ℤ≥ ‘M)
⋀ A ∈ ℂ) →
Σk ∈ (M...N)A = (((N −
M) + 1) · A)) |