| Step | Hyp | Ref
| Expression |
| 1 | | ixpfn 6873 |
. . . . 5
⊢ (𝑓 ∈ X𝑛 ∈
ℕ0 (𝑃‘𝑛) → 𝑓 Fn ℕ0) |
| 2 | 1 | ad2antlr 489 |
. . . 4
⊢ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → 𝑓 Fn ℕ0) |
| 3 | | depind.p |
. . . . . . . 8
⊢ (𝜑 → 𝑃:ℕ0⟶V) |
| 4 | | depind.0 |
. . . . . . . 8
⊢ (𝜑 → 𝐴 ∈ (𝑃‘0)) |
| 5 | | depind.h |
. . . . . . . 8
⊢ (𝜑 → ∀𝑛 ∈ ℕ0 (𝐻‘𝑛):(𝑃‘𝑛)⟶(𝑃‘(𝑛 + 1))) |
| 6 | | depindlem1.4 |
. . . . . . . 8
⊢ 𝐹 = seq0((𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))) |
| 7 | 3, 4, 5, 6 | depindlem1 16346 |
. . . . . . 7
⊢ (𝜑 → (𝐹:ℕ0⟶V ∧ (𝐹‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝐹‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝐹‘𝑛)))) |
| 8 | 7 | ad2antrr 488 |
. . . . . 6
⊢ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝐹:ℕ0⟶V ∧ (𝐹‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝐹‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝐹‘𝑛)))) |
| 9 | 8 | simp1d 1035 |
. . . . 5
⊢ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → 𝐹:ℕ0⟶V) |
| 10 | 9 | ffnd 5483 |
. . . 4
⊢ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → 𝐹 Fn ℕ0) |
| 11 | | fveq2 5639 |
. . . . . . . 8
⊢ (𝑦 = 0 → (𝑓‘𝑦) = (𝑓‘0)) |
| 12 | | fveq2 5639 |
. . . . . . . 8
⊢ (𝑦 = 0 → (𝐹‘𝑦) = (𝐹‘0)) |
| 13 | 11, 12 | eqeq12d 2246 |
. . . . . . 7
⊢ (𝑦 = 0 → ((𝑓‘𝑦) = (𝐹‘𝑦) ↔ (𝑓‘0) = (𝐹‘0))) |
| 14 | 13 | imbi2d 230 |
. . . . . 6
⊢ (𝑦 = 0 → ((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘𝑦) = (𝐹‘𝑦)) ↔ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘0) = (𝐹‘0)))) |
| 15 | | fveq2 5639 |
. . . . . . . 8
⊢ (𝑦 = 𝑘 → (𝑓‘𝑦) = (𝑓‘𝑘)) |
| 16 | | fveq2 5639 |
. . . . . . . 8
⊢ (𝑦 = 𝑘 → (𝐹‘𝑦) = (𝐹‘𝑘)) |
| 17 | 15, 16 | eqeq12d 2246 |
. . . . . . 7
⊢ (𝑦 = 𝑘 → ((𝑓‘𝑦) = (𝐹‘𝑦) ↔ (𝑓‘𝑘) = (𝐹‘𝑘))) |
| 18 | 17 | imbi2d 230 |
. . . . . 6
⊢ (𝑦 = 𝑘 → ((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘𝑦) = (𝐹‘𝑦)) ↔ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘𝑘) = (𝐹‘𝑘)))) |
| 19 | | fveq2 5639 |
. . . . . . . 8
⊢ (𝑦 = (𝑘 + 1) → (𝑓‘𝑦) = (𝑓‘(𝑘 + 1))) |
| 20 | | fveq2 5639 |
. . . . . . . 8
⊢ (𝑦 = (𝑘 + 1) → (𝐹‘𝑦) = (𝐹‘(𝑘 + 1))) |
| 21 | 19, 20 | eqeq12d 2246 |
. . . . . . 7
⊢ (𝑦 = (𝑘 + 1) → ((𝑓‘𝑦) = (𝐹‘𝑦) ↔ (𝑓‘(𝑘 + 1)) = (𝐹‘(𝑘 + 1)))) |
| 22 | 21 | imbi2d 230 |
. . . . . 6
⊢ (𝑦 = (𝑘 + 1) → ((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘𝑦) = (𝐹‘𝑦)) ↔ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘(𝑘 + 1)) = (𝐹‘(𝑘 + 1))))) |
| 23 | | simprl 531 |
. . . . . . 7
⊢ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘0) = 𝐴) |
| 24 | 8 | simp2d 1036 |
. . . . . . 7
⊢ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝐹‘0) = 𝐴) |
| 25 | 23, 24 | eqtr4d 2267 |
. . . . . 6
⊢ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘0) = (𝐹‘0)) |
| 26 | | fveq2 5639 |
. . . . . . . . . . 11
⊢ ((𝑓‘𝑘) = (𝐹‘𝑘) → ((𝐻‘𝑘)‘(𝑓‘𝑘)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 27 | 26 | ad2antlr 489 |
. . . . . . . . . 10
⊢
(((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈
ℕ0 (𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) ∧ (𝑓‘𝑘) = (𝐹‘𝑘)) ∧ 𝑘 ∈ ℕ0) → ((𝐻‘𝑘)‘(𝑓‘𝑘)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 28 | | simplrr 538 |
. . . . . . . . . . 11
⊢ ((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) ∧ (𝑓‘𝑘) = (𝐹‘𝑘)) → ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛))) |
| 29 | | fvoveq1 6041 |
. . . . . . . . . . . . 13
⊢ (𝑛 = 𝑘 → (𝑓‘(𝑛 + 1)) = (𝑓‘(𝑘 + 1))) |
| 30 | | fveq2 5639 |
. . . . . . . . . . . . . 14
⊢ (𝑛 = 𝑘 → (𝐻‘𝑛) = (𝐻‘𝑘)) |
| 31 | | fveq2 5639 |
. . . . . . . . . . . . . 14
⊢ (𝑛 = 𝑘 → (𝑓‘𝑛) = (𝑓‘𝑘)) |
| 32 | 30, 31 | fveq12d 5646 |
. . . . . . . . . . . . 13
⊢ (𝑛 = 𝑘 → ((𝐻‘𝑛)‘(𝑓‘𝑛)) = ((𝐻‘𝑘)‘(𝑓‘𝑘))) |
| 33 | 29, 32 | eqeq12d 2246 |
. . . . . . . . . . . 12
⊢ (𝑛 = 𝑘 → ((𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)) ↔ (𝑓‘(𝑘 + 1)) = ((𝐻‘𝑘)‘(𝑓‘𝑘)))) |
| 34 | 33 | rspccva 2909 |
. . . . . . . . . . 11
⊢
((∀𝑛 ∈
ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)) ∧ 𝑘 ∈ ℕ0) → (𝑓‘(𝑘 + 1)) = ((𝐻‘𝑘)‘(𝑓‘𝑘))) |
| 35 | 28, 34 | sylan 283 |
. . . . . . . . . 10
⊢
(((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈
ℕ0 (𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) ∧ (𝑓‘𝑘) = (𝐹‘𝑘)) ∧ 𝑘 ∈ ℕ0) → (𝑓‘(𝑘 + 1)) = ((𝐻‘𝑘)‘(𝑓‘𝑘))) |
| 36 | 8 | simp3d 1037 |
. . . . . . . . . . . 12
⊢ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → ∀𝑛 ∈ ℕ0 (𝐹‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝐹‘𝑛))) |
| 37 | 36 | adantr 276 |
. . . . . . . . . . 11
⊢ ((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) ∧ (𝑓‘𝑘) = (𝐹‘𝑘)) → ∀𝑛 ∈ ℕ0 (𝐹‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝐹‘𝑛))) |
| 38 | | fvoveq1 6041 |
. . . . . . . . . . . . 13
⊢ (𝑛 = 𝑘 → (𝐹‘(𝑛 + 1)) = (𝐹‘(𝑘 + 1))) |
| 39 | | fveq2 5639 |
. . . . . . . . . . . . . 14
⊢ (𝑛 = 𝑘 → (𝐹‘𝑛) = (𝐹‘𝑘)) |
| 40 | 30, 39 | fveq12d 5646 |
. . . . . . . . . . . . 13
⊢ (𝑛 = 𝑘 → ((𝐻‘𝑛)‘(𝐹‘𝑛)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 41 | 38, 40 | eqeq12d 2246 |
. . . . . . . . . . . 12
⊢ (𝑛 = 𝑘 → ((𝐹‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝐹‘𝑛)) ↔ (𝐹‘(𝑘 + 1)) = ((𝐻‘𝑘)‘(𝐹‘𝑘)))) |
| 42 | 41 | rspccva 2909 |
. . . . . . . . . . 11
⊢
((∀𝑛 ∈
ℕ0 (𝐹‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝐹‘𝑛)) ∧ 𝑘 ∈ ℕ0) → (𝐹‘(𝑘 + 1)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 43 | 37, 42 | sylan 283 |
. . . . . . . . . 10
⊢
(((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈
ℕ0 (𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) ∧ (𝑓‘𝑘) = (𝐹‘𝑘)) ∧ 𝑘 ∈ ℕ0) → (𝐹‘(𝑘 + 1)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 44 | 27, 35, 43 | 3eqtr4d 2274 |
. . . . . . . . 9
⊢
(((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈
ℕ0 (𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) ∧ (𝑓‘𝑘) = (𝐹‘𝑘)) ∧ 𝑘 ∈ ℕ0) → (𝑓‘(𝑘 + 1)) = (𝐹‘(𝑘 + 1))) |
| 45 | 44 | exp31 364 |
. . . . . . . 8
⊢ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → ((𝑓‘𝑘) = (𝐹‘𝑘) → (𝑘 ∈ ℕ0 → (𝑓‘(𝑘 + 1)) = (𝐹‘(𝑘 + 1))))) |
| 46 | 45 | com3r 79 |
. . . . . . 7
⊢ (𝑘 ∈ ℕ0
→ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈
ℕ0 (𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → ((𝑓‘𝑘) = (𝐹‘𝑘) → (𝑓‘(𝑘 + 1)) = (𝐹‘(𝑘 + 1))))) |
| 47 | 46 | a2d 26 |
. . . . . 6
⊢ (𝑘 ∈ ℕ0
→ ((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈
ℕ0 (𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘𝑘) = (𝐹‘𝑘)) → (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘(𝑘 + 1)) = (𝐹‘(𝑘 + 1))))) |
| 48 | 14, 18, 22, 18, 25, 47 | nn0ind 9594 |
. . . . 5
⊢ (𝑘 ∈ ℕ0
→ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈
ℕ0 (𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → (𝑓‘𝑘) = (𝐹‘𝑘))) |
| 49 | 48 | impcom 125 |
. . . 4
⊢ ((((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) ∧ 𝑘 ∈ ℕ0) → (𝑓‘𝑘) = (𝐹‘𝑘)) |
| 50 | 2, 10, 49 | eqfnfvd 5747 |
. . 3
⊢ (((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) ∧ ((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛)))) → 𝑓 = 𝐹) |
| 51 | 50 | ex 115 |
. 2
⊢ ((𝜑 ∧ 𝑓 ∈ X𝑛 ∈ ℕ0
(𝑃‘𝑛)) → (((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛))) → 𝑓 = 𝐹)) |
| 52 | 51 | ralrimiva 2605 |
1
⊢ (𝜑 → ∀𝑓 ∈ X 𝑛 ∈ ℕ0
(𝑃‘𝑛)(((𝑓‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝑓‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝑓‘𝑛))) → 𝑓 = 𝐹)) |