Step | Hyp | Ref
| Expression |
1 | | 1e0p1 12716 |
. . 3
β’ 1 = (0 +
1) |
2 | 1 | fveq2i 6892 |
. 2
β’
(Ackβ1) = (Ackβ(0 + 1)) |
3 | | 0nn0 12484 |
. . 3
β’ 0 β
β0 |
4 | | ackvalsuc1mpt 47318 |
. . 3
β’ (0 β
β0 β (Ackβ(0 + 1)) = (π β β0 β¦
(((IterCompβ(Ackβ0))β(π + 1))β1))) |
5 | 3, 4 | ax-mp 5 |
. 2
β’
(Ackβ(0 + 1)) = (π β β0 β¦
(((IterCompβ(Ackβ0))β(π + 1))β1)) |
6 | | peano2nn0 12509 |
. . . . . . 7
β’ (π β β0
β (π + 1) β
β0) |
7 | | 1nn0 12485 |
. . . . . . 7
β’ 1 β
β0 |
8 | | ackval0 47320 |
. . . . . . . 8
β’
(Ackβ0) = (π
β β0 β¦ (π + 1)) |
9 | 8 | itcovalpc 47312 |
. . . . . . 7
β’ (((π + 1) β β0
β§ 1 β β0) β
((IterCompβ(Ackβ0))β(π + 1)) = (π β β0 β¦ (π + (1 Β· (π + 1))))) |
10 | 6, 7, 9 | sylancl 587 |
. . . . . 6
β’ (π β β0
β ((IterCompβ(Ackβ0))β(π + 1)) = (π β β0 β¦ (π + (1 Β· (π + 1))))) |
11 | | nn0cn 12479 |
. . . . . . . . . 10
β’ ((π + 1) β β0
β (π + 1) β
β) |
12 | 6, 11 | syl 17 |
. . . . . . . . 9
β’ (π β β0
β (π + 1) β
β) |
13 | 12 | mullidd 11229 |
. . . . . . . 8
β’ (π β β0
β (1 Β· (π + 1))
= (π + 1)) |
14 | 13 | oveq2d 7422 |
. . . . . . 7
β’ (π β β0
β (π + (1 Β·
(π + 1))) = (π + (π + 1))) |
15 | 14 | mpteq2dv 5250 |
. . . . . 6
β’ (π β β0
β (π β
β0 β¦ (π + (1 Β· (π + 1)))) = (π β β0 β¦ (π + (π + 1)))) |
16 | 10, 15 | eqtrd 2773 |
. . . . 5
β’ (π β β0
β ((IterCompβ(Ackβ0))β(π + 1)) = (π β β0 β¦ (π + (π + 1)))) |
17 | 16 | fveq1d 6891 |
. . . 4
β’ (π β β0
β (((IterCompβ(Ackβ0))β(π + 1))β1) = ((π β β0 β¦ (π + (π + 1)))β1)) |
18 | | eqidd 2734 |
. . . . 5
β’ (π β β0
β (π β
β0 β¦ (π + (π + 1))) = (π β β0 β¦ (π + (π + 1)))) |
19 | | oveq1 7413 |
. . . . . 6
β’ (π = 1 β (π + (π + 1)) = (1 + (π + 1))) |
20 | 19 | adantl 483 |
. . . . 5
β’ ((π β β0
β§ π = 1) β (π + (π + 1)) = (1 + (π + 1))) |
21 | 7 | a1i 11 |
. . . . 5
β’ (π β β0
β 1 β β0) |
22 | | ovexd 7441 |
. . . . 5
β’ (π β β0
β (1 + (π + 1)) β
V) |
23 | 18, 20, 21, 22 | fvmptd 7003 |
. . . 4
β’ (π β β0
β ((π β
β0 β¦ (π + (π + 1)))β1) = (1 + (π + 1))) |
24 | | 1cnd 11206 |
. . . . . 6
β’ (π β β0
β 1 β β) |
25 | | nn0cn 12479 |
. . . . . . 7
β’ (π β β0
β π β
β) |
26 | | peano2cn 11383 |
. . . . . . 7
β’ (π β β β (π + 1) β
β) |
27 | 25, 26 | syl 17 |
. . . . . 6
β’ (π β β0
β (π + 1) β
β) |
28 | 24, 27 | addcomd 11413 |
. . . . 5
β’ (π β β0
β (1 + (π + 1)) =
((π + 1) +
1)) |
29 | 25, 24, 24 | addassd 11233 |
. . . . 5
β’ (π β β0
β ((π + 1) + 1) =
(π + (1 +
1))) |
30 | | 1p1e2 12334 |
. . . . . . 7
β’ (1 + 1) =
2 |
31 | 30 | oveq2i 7417 |
. . . . . 6
β’ (π + (1 + 1)) = (π + 2) |
32 | 31 | a1i 11 |
. . . . 5
β’ (π β β0
β (π + (1 + 1)) =
(π + 2)) |
33 | 28, 29, 32 | 3eqtrd 2777 |
. . . 4
β’ (π β β0
β (1 + (π + 1)) =
(π + 2)) |
34 | 17, 23, 33 | 3eqtrd 2777 |
. . 3
β’ (π β β0
β (((IterCompβ(Ackβ0))β(π + 1))β1) = (π + 2)) |
35 | 34 | mpteq2ia 5251 |
. 2
β’ (π β β0
β¦ (((IterCompβ(Ackβ0))β(π + 1))β1)) = (π β β0 β¦ (π + 2)) |
36 | 2, 5, 35 | 3eqtri 2765 |
1
β’
(Ackβ1) = (π
β β0 β¦ (π + 2)) |