Proof of Theorem expcllem
| Step | Hyp | Ref
| Expression |
| 1 | | opreq2 3007 |
. . . . . 6
⊢ (z = 1
→ (A↑z) = (A↑1)) |
| 2 | 1 | eleq1d 1155 |
. . . . 5
⊢ (z = 1
→ ((A↑z) ∈ F
↔ (A↑1) ∈ F)) |
| 3 | 2 | imbi2d 464 |
. . . 4
⊢ (z = 1
→ ((A ∈ F → (A↑z) ∈
F) ↔ (A ∈ F
→ (A↑1) ∈ F))) |
| 4 | | opreq2 3007 |
. . . . . 6
⊢ (z =
w → (A↑z) =
(A↑w)) |
| 5 | 4 | eleq1d 1155 |
. . . . 5
⊢ (z =
w → ((A↑z) ∈
F ↔ (A↑w) ∈
F)) |
| 6 | 5 | imbi2d 464 |
. . . 4
⊢ (z =
w → ((A ∈ F
→ (A↑z) ∈ F)
↔ (A ∈ F → (A↑w) ∈
F))) |
| 7 | | opreq2 3007 |
. . . . . 6
⊢ (z =
(w + 1) → (A↑z) =
(A↑(w + 1))) |
| 8 | 7 | eleq1d 1155 |
. . . . 5
⊢ (z =
(w + 1) → ((A↑z) ∈
F ↔ (A↑(w + 1))
∈ F)) |
| 9 | 8 | imbi2d 464 |
. . . 4
⊢ (z =
(w + 1) → ((A ∈ F
→ (A↑z) ∈ F)
↔ (A ∈ F → (A↑(w + 1))
∈ F))) |
| 10 | | opreq2 3007 |
. . . . . 6
⊢ (z =
B → (A↑z) =
(A↑B)) |
| 11 | 10 | eleq1d 1155 |
. . . . 5
⊢ (z =
B → ((A↑z) ∈
F ↔ (A↑B) ∈
F)) |
| 12 | 11 | imbi2d 464 |
. . . 4
⊢ (z =
B → ((A ∈ F
→ (A↑z) ∈ F)
↔ (A ∈ F → (A↑B) ∈
F))) |
| 13 | | expcllem.1 |
. . . . . . . 8
⊢ F
⊆ ℂ |
| 14 | 13 | sseli 1504 |
. . . . . . 7
⊢ (A
∈ F → A ∈ ℂ) |
| 15 | | exp1t 4679 |
. . . . . . 7
⊢ (A
∈ ℂ → (A↑1) = A) |
| 16 | 14, 15 | syl 12 |
. . . . . 6
⊢ (A
∈ F → (A↑1) = A) |
| 17 | 16 | eleq1d 1155 |
. . . . 5
⊢ (A
∈ F → ((A↑1) ∈ F ↔ A
∈ F)) |
| 18 | 17 | ibir 450 |
. . . 4
⊢ (A
∈ F → (A↑1) ∈ F) |
| 19 | | opreq1 3006 |
. . . . . . . . . . . 12
⊢ (x =
(A↑w) → (x
· y) = ((A↑w)
· y)) |
| 20 | 19 | eleq1d 1155 |
. . . . . . . . . . 11
⊢ (x =
(A↑w) → ((x
· y) ∈ F ↔ ((A↑w)
· y) ∈ F)) |
| 21 | | opreq2 3007 |
. . . . . . . . . . . 12
⊢ (y =
A → ((A↑w)
· y) = ((A↑w)
· A)) |
| 22 | 21 | eleq1d 1155 |
. . . . . . . . . . 11
⊢ (y =
A → (((A↑w)
· y) ∈ F ↔ ((A↑w)
· A) ∈ F)) |
| 23 | | expcllem.2 |
. . . . . . . . . . 11
⊢ ((x
∈ F ∧ y ∈ F)
→ (x · y) ∈ F) |
| 24 | 20, 22, 23 | vtocl2ga 1388 |
. . . . . . . . . 10
⊢ (((A↑w) ∈
F ∧ A ∈ F)
→ ((A↑w) · A)
∈ F) |
| 25 | 24 | ancoms 334 |
. . . . . . . . 9
⊢ ((A
∈ F ∧ (A↑w) ∈
F) → ((A↑w)
· A) ∈ F) |
| 26 | 25 | adantlr 310 |
. . . . . . . 8
⊢ (((A
∈ F ∧ w ∈ ℕ) ∧ (A↑w) ∈
F) → ((A↑w)
· A) ∈ F) |
| 27 | | expp1t 4678 |
. . . . . . . . . . 11
⊢ ((A
∈ ℂ ∧ w ∈ ℕ)
→ (A↑(w + 1)) = ((A↑w)
· A)) |
| 28 | 27, 14 | sylan 343 |
. . . . . . . . . 10
⊢ ((A
∈ F ∧ w ∈ ℕ) → (A↑(w + 1))
= ((A↑w) · A)) |
| 29 | 28 | eleq1d 1155 |
. . . . . . . . 9
⊢ ((A
∈ F ∧ w ∈ ℕ) → ((A↑(w + 1))
∈ F ↔ ((A↑w)
· A) ∈ F)) |
| 30 | 29 | adantr 306 |
. . . . . . . 8
⊢ (((A
∈ F ∧ w ∈ ℕ) ∧ (A↑w) ∈
F) → ((A↑(w + 1))
∈ F ↔ ((A↑w)
· A) ∈ F)) |
| 31 | 26, 30 | mpbird 171 |
. . . . . . 7
⊢ (((A
∈ F ∧ w ∈ ℕ) ∧ (A↑w) ∈
F) → (A↑(w + 1))
∈ F) |
| 32 | 31 | exp31 293 |
. . . . . 6
⊢ (A
∈ F → (w ∈ ℕ → ((A↑w) ∈
F → (A↑(w + 1))
∈ F))) |
| 33 | 32 | com12 13 |
. . . . 5
⊢ (w
∈ ℕ → (A ∈ F → ((A↑w) ∈
F → (A↑(w + 1))
∈ F))) |
| 34 | 33 | a2d 15 |
. . . 4
⊢ (w
∈ ℕ → ((A ∈ F → (A↑w) ∈
F) → (A ∈ F
→ (A↑(w + 1)) ∈ F))) |
| 35 | 3, 6, 9, 12, 18, 34 | nnind 4434 |
. . 3
⊢ (B
∈ ℕ → (A ∈ F → (A↑B) ∈
F)) |
| 36 | 35 | imp 277 |
. 2
⊢ ((B
∈ ℕ ∧ A ∈ F) → (A↑B) ∈
F) |
| 37 | 36 | ancoms 334 |
1
⊢ ((A
∈ F ∧ B ∈ ℕ) → (A↑B) ∈
F) |