| Step | Hyp | Ref
| Expression |
| 1 | | nn0uz 9791 |
. . . 4
⊢
ℕ0 = (ℤ≥‘0) |
| 2 | | 0zd 9491 |
. . . 4
⊢ (𝜑 → 0 ∈
ℤ) |
| 3 | | nn0ex 9408 |
. . . . . . 7
⊢
ℕ0 ∈ V |
| 4 | 3 | mptex 5880 |
. . . . . 6
⊢ (𝑚 ∈ ℕ0
↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1)))) ∈ V |
| 5 | | vex 2805 |
. . . . . 6
⊢ 𝑦 ∈ V |
| 6 | 4, 5 | fvex 5659 |
. . . . 5
⊢ ((𝑚 ∈ ℕ0
↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘𝑦) ∈ V |
| 7 | 6 | a1i 9 |
. . . 4
⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → ((𝑚 ∈ ℕ0
↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘𝑦) ∈ V) |
| 8 | | eqid 2231 |
. . . . . 6
⊢ (𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)) = (𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)) |
| 9 | | vex 2805 |
. . . . . . 7
⊢ ℎ ∈ V |
| 10 | | vex 2805 |
. . . . . . 7
⊢ 𝑥 ∈ V |
| 11 | 9, 10 | fvex 5659 |
. . . . . 6
⊢ (ℎ‘𝑥) ∈ V |
| 12 | | vex 2805 |
. . . . . 6
⊢ 𝑧 ∈ V |
| 13 | 8, 11, 5, 12 | mpofvexi 6371 |
. . . . 5
⊢ (𝑦(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))𝑧) ∈ V |
| 14 | 13 | a1i 9 |
. . . 4
⊢ ((𝜑 ∧ (𝑦 ∈ V ∧ 𝑧 ∈ V)) → (𝑦(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))𝑧) ∈ V) |
| 15 | 1, 2, 7, 14 | seqf 10727 |
. . 3
⊢ (𝜑 → seq0((𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 −
1))))):ℕ0⟶V) |
| 16 | | depindlem1.4 |
. . . 4
⊢ 𝐹 = seq0((𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))) |
| 17 | 16 | feq1i 5475 |
. . 3
⊢ (𝐹:ℕ0⟶V
↔ seq0((𝑥 ∈ V,
ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 −
1))))):ℕ0⟶V) |
| 18 | 15, 17 | sylibr 134 |
. 2
⊢ (𝜑 → 𝐹:ℕ0⟶V) |
| 19 | 16 | fveq1i 5640 |
. . . 4
⊢ (𝐹‘0) = (seq0((𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1)))))‘0) |
| 20 | 6 | a1i 9 |
. . . . 5
⊢ ((𝜑 ∧ 𝑦 ∈ (ℤ≥‘0))
→ ((𝑚 ∈
ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘𝑦) ∈ V) |
| 21 | 2, 20, 14 | seq3-1 10725 |
. . . 4
⊢ (𝜑 → (seq0((𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1)))))‘0) = ((𝑚 ∈ ℕ0
↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘0)) |
| 22 | 19, 21 | eqtrid 2276 |
. . 3
⊢ (𝜑 → (𝐹‘0) = ((𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘0)) |
| 23 | | 0nn0 9417 |
. . . 4
⊢ 0 ∈
ℕ0 |
| 24 | | depind.0 |
. . . 4
⊢ (𝜑 → 𝐴 ∈ (𝑃‘0)) |
| 25 | | iftrue 3610 |
. . . . 5
⊢ (𝑚 = 0 → if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))) = 𝐴) |
| 26 | | eqid 2231 |
. . . . 5
⊢ (𝑚 ∈ ℕ0
↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1)))) = (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1)))) |
| 27 | 25, 26 | fvmptg 5722 |
. . . 4
⊢ ((0
∈ ℕ0 ∧ 𝐴 ∈ (𝑃‘0)) → ((𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘0) = 𝐴) |
| 28 | 23, 24, 27 | sylancr 414 |
. . 3
⊢ (𝜑 → ((𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘0) = 𝐴) |
| 29 | 22, 28 | eqtrd 2264 |
. 2
⊢ (𝜑 → (𝐹‘0) = 𝐴) |
| 30 | | simpr 110 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝑘 ∈
ℕ0) |
| 31 | 30, 1 | eleqtrdi 2324 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝑘 ∈
(ℤ≥‘0)) |
| 32 | 6 | a1i 9 |
. . . . . . . 8
⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ 𝑦 ∈
(ℤ≥‘0)) → ((𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘𝑦) ∈ V) |
| 33 | 13 | a1i 9 |
. . . . . . . 8
⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ (𝑦 ∈ V ∧ 𝑧 ∈ V)) → (𝑦(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))𝑧) ∈ V) |
| 34 | 31, 32, 33 | seq3p1 10728 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) →
(seq0((𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1)))))‘(𝑘 + 1)) = ((seq0((𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1)))))‘𝑘)(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))((𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘(𝑘 + 1)))) |
| 35 | 16 | fveq1i 5640 |
. . . . . . 7
⊢ (𝐹‘(𝑘 + 1)) = (seq0((𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1)))))‘(𝑘 + 1)) |
| 36 | 16 | fveq1i 5640 |
. . . . . . . 8
⊢ (𝐹‘𝑘) = (seq0((𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1)))))‘𝑘) |
| 37 | 36 | oveq1i 6028 |
. . . . . . 7
⊢ ((𝐹‘𝑘)(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))((𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘(𝑘 + 1))) = ((seq0((𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)), (𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1)))))‘𝑘)(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))((𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘(𝑘 + 1))) |
| 38 | 34, 35, 37 | 3eqtr4g 2289 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹‘(𝑘 + 1)) = ((𝐹‘𝑘)(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))((𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘(𝑘 + 1)))) |
| 39 | | eqeq1 2238 |
. . . . . . . . . 10
⊢ (𝑚 = (𝑘 + 1) → (𝑚 = 0 ↔ (𝑘 + 1) = 0)) |
| 40 | | fvoveq1 6041 |
. . . . . . . . . 10
⊢ (𝑚 = (𝑘 + 1) → (𝐻‘(𝑚 − 1)) = (𝐻‘((𝑘 + 1) − 1))) |
| 41 | 39, 40 | ifbieq2d 3630 |
. . . . . . . . 9
⊢ (𝑚 = (𝑘 + 1) → if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))) = if((𝑘 + 1) = 0, 𝐴, (𝐻‘((𝑘 + 1) − 1)))) |
| 42 | | nn0p1nn 9441 |
. . . . . . . . . . 11
⊢ (𝑘 ∈ ℕ0
→ (𝑘 + 1) ∈
ℕ) |
| 43 | 42 | adantl 277 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝑘 + 1) ∈
ℕ) |
| 44 | 43 | nnnn0d 9455 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝑘 + 1) ∈
ℕ0) |
| 45 | 43 | nnne0d 9188 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝑘 + 1) ≠ 0) |
| 46 | 45 | neneqd 2423 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ¬
(𝑘 + 1) =
0) |
| 47 | 46 | iffalsed 3615 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → if((𝑘 + 1) = 0, 𝐴, (𝐻‘((𝑘 + 1) − 1))) = (𝐻‘((𝑘 + 1) − 1))) |
| 48 | 30 | nn0cnd 9457 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝑘 ∈
ℂ) |
| 49 | | pncan1 8556 |
. . . . . . . . . . . . 13
⊢ (𝑘 ∈ ℂ → ((𝑘 + 1) − 1) = 𝑘) |
| 50 | 48, 49 | syl 14 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝑘 + 1) − 1) = 𝑘) |
| 51 | 50 | fveq2d 5643 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐻‘((𝑘 + 1) − 1)) = (𝐻‘𝑘)) |
| 52 | 47, 51 | eqtrd 2264 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → if((𝑘 + 1) = 0, 𝐴, (𝐻‘((𝑘 + 1) − 1))) = (𝐻‘𝑘)) |
| 53 | | depind.h |
. . . . . . . . . . . 12
⊢ (𝜑 → ∀𝑛 ∈ ℕ0 (𝐻‘𝑛):(𝑃‘𝑛)⟶(𝑃‘(𝑛 + 1))) |
| 54 | | fveq2 5639 |
. . . . . . . . . . . . . 14
⊢ (𝑛 = 𝑘 → (𝐻‘𝑛) = (𝐻‘𝑘)) |
| 55 | | fveq2 5639 |
. . . . . . . . . . . . . 14
⊢ (𝑛 = 𝑘 → (𝑃‘𝑛) = (𝑃‘𝑘)) |
| 56 | | fvoveq1 6041 |
. . . . . . . . . . . . . 14
⊢ (𝑛 = 𝑘 → (𝑃‘(𝑛 + 1)) = (𝑃‘(𝑘 + 1))) |
| 57 | 54, 55, 56 | feq123d 5473 |
. . . . . . . . . . . . 13
⊢ (𝑛 = 𝑘 → ((𝐻‘𝑛):(𝑃‘𝑛)⟶(𝑃‘(𝑛 + 1)) ↔ (𝐻‘𝑘):(𝑃‘𝑘)⟶(𝑃‘(𝑘 + 1)))) |
| 58 | 57 | rspccva 2909 |
. . . . . . . . . . . 12
⊢
((∀𝑛 ∈
ℕ0 (𝐻‘𝑛):(𝑃‘𝑛)⟶(𝑃‘(𝑛 + 1)) ∧ 𝑘 ∈ ℕ0) → (𝐻‘𝑘):(𝑃‘𝑘)⟶(𝑃‘(𝑘 + 1))) |
| 59 | 53, 58 | sylan 283 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐻‘𝑘):(𝑃‘𝑘)⟶(𝑃‘(𝑘 + 1))) |
| 60 | | depind.p |
. . . . . . . . . . . 12
⊢ (𝜑 → 𝑃:ℕ0⟶V) |
| 61 | 60 | ffvelcdmda 5782 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝑃‘𝑘) ∈ V) |
| 62 | 59, 61 | fexd 5884 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐻‘𝑘) ∈ V) |
| 63 | 52, 62 | eqeltrd 2308 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → if((𝑘 + 1) = 0, 𝐴, (𝐻‘((𝑘 + 1) − 1))) ∈ V) |
| 64 | 26, 41, 44, 63 | fvmptd3 5740 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝑚 ∈ ℕ0
↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘(𝑘 + 1)) = if((𝑘 + 1) = 0, 𝐴, (𝐻‘((𝑘 + 1) − 1)))) |
| 65 | 64, 52 | eqtrd 2264 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝑚 ∈ ℕ0
↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘(𝑘 + 1)) = (𝐻‘𝑘)) |
| 66 | 65 | oveq2d 6034 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝐹‘𝑘)(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))((𝑚 ∈ ℕ0 ↦ if(𝑚 = 0, 𝐴, (𝐻‘(𝑚 − 1))))‘(𝑘 + 1))) = ((𝐹‘𝑘)(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))(𝐻‘𝑘))) |
| 67 | 38, 66 | eqtrd 2264 |
. . . . 5
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹‘(𝑘 + 1)) = ((𝐹‘𝑘)(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))(𝐻‘𝑘))) |
| 68 | 18 | ffvelcdmda 5782 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹‘𝑘) ∈ V) |
| 69 | | fvexg 5658 |
. . . . . . 7
⊢ (((𝐻‘𝑘) ∈ V ∧ (𝐹‘𝑘) ∈ V) → ((𝐻‘𝑘)‘(𝐹‘𝑘)) ∈ V) |
| 70 | 62, 68, 69 | syl2anc 411 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝐻‘𝑘)‘(𝐹‘𝑘)) ∈ V) |
| 71 | | fveq2 5639 |
. . . . . . 7
⊢ (𝑦 = (𝐹‘𝑘) → (𝑧‘𝑦) = (𝑧‘(𝐹‘𝑘))) |
| 72 | | fveq1 5638 |
. . . . . . 7
⊢ (𝑧 = (𝐻‘𝑘) → (𝑧‘(𝐹‘𝑘)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 73 | | fveq2 5639 |
. . . . . . . 8
⊢ (𝑥 = 𝑦 → (ℎ‘𝑥) = (ℎ‘𝑦)) |
| 74 | | fveq1 5638 |
. . . . . . . 8
⊢ (ℎ = 𝑧 → (ℎ‘𝑦) = (𝑧‘𝑦)) |
| 75 | 73, 74 | cbvmpov 6101 |
. . . . . . 7
⊢ (𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥)) = (𝑦 ∈ V, 𝑧 ∈ V ↦ (𝑧‘𝑦)) |
| 76 | 71, 72, 75 | ovmpog 6156 |
. . . . . 6
⊢ (((𝐹‘𝑘) ∈ V ∧ (𝐻‘𝑘) ∈ V ∧ ((𝐻‘𝑘)‘(𝐹‘𝑘)) ∈ V) → ((𝐹‘𝑘)(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))(𝐻‘𝑘)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 77 | 68, 62, 70, 76 | syl3anc 1273 |
. . . . 5
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝐹‘𝑘)(𝑥 ∈ V, ℎ ∈ V ↦ (ℎ‘𝑥))(𝐻‘𝑘)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 78 | 67, 77 | eqtrd 2264 |
. . . 4
⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹‘(𝑘 + 1)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 79 | 78 | ralrimiva 2605 |
. . 3
⊢ (𝜑 → ∀𝑘 ∈ ℕ0 (𝐹‘(𝑘 + 1)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 80 | | fvoveq1 6041 |
. . . . 5
⊢ (𝑛 = 𝑘 → (𝐹‘(𝑛 + 1)) = (𝐹‘(𝑘 + 1))) |
| 81 | | fveq2 5639 |
. . . . . 6
⊢ (𝑛 = 𝑘 → (𝐹‘𝑛) = (𝐹‘𝑘)) |
| 82 | 54, 81 | fveq12d 5646 |
. . . . 5
⊢ (𝑛 = 𝑘 → ((𝐻‘𝑛)‘(𝐹‘𝑛)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 83 | 80, 82 | eqeq12d 2246 |
. . . 4
⊢ (𝑛 = 𝑘 → ((𝐹‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝐹‘𝑛)) ↔ (𝐹‘(𝑘 + 1)) = ((𝐻‘𝑘)‘(𝐹‘𝑘)))) |
| 84 | 83 | cbvralvw 2771 |
. . 3
⊢
(∀𝑛 ∈
ℕ0 (𝐹‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝐹‘𝑛)) ↔ ∀𝑘 ∈ ℕ0 (𝐹‘(𝑘 + 1)) = ((𝐻‘𝑘)‘(𝐹‘𝑘))) |
| 85 | 79, 84 | sylibr 134 |
. 2
⊢ (𝜑 → ∀𝑛 ∈ ℕ0 (𝐹‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝐹‘𝑛))) |
| 86 | 18, 29, 85 | 3jca 1203 |
1
⊢ (𝜑 → (𝐹:ℕ0⟶V ∧ (𝐹‘0) = 𝐴 ∧ ∀𝑛 ∈ ℕ0 (𝐹‘(𝑛 + 1)) = ((𝐻‘𝑛)‘(𝐹‘𝑛)))) |