Proof of Theorem uzaddclt
| Step | Hyp | Ref
| Expression |
| 1 | | ax1cn 5281 |
. . . . . . . . . 10
⊢ 1 ∈ ℂ |
| 2 | | axaddass 5289 |
. . . . . . . . . 10
⊢ ((N ∈ ℂ ⋀ k ∈ ℂ ⋀ 1 ∈ ℂ) →
((N + k) + 1) = (N +
(k + 1))) |
| 3 | 1, 2 | mp3an3 907 |
. . . . . . . . 9
⊢ ((N ∈ ℂ ⋀ k ∈ ℂ) → ((N
+ k) + 1) = (N + (k +
1))) |
| 4 | | eluzelz 6424 |
. . . . . . . . . 10
⊢ (N ∈ (ℤ≥ ‘M) → N
∈ ℤ) |
| 5 | | zcnt 6142 |
. . . . . . . . . 10
⊢ (N ∈ ℤ → N
∈ ℂ) |
| 6 | 4, 5 | syl 10 |
. . . . . . . . 9
⊢ (N ∈ (ℤ≥ ‘M) → N
∈ ℂ) |
| 7 | | nn0cnt 6111 |
. . . . . . . . 9
⊢ (k ∈ ℕ0 → k ∈ ℂ) |
| 8 | 3, 6, 7 | syl2an 456 |
. . . . . . . 8
⊢ ((N ∈ (ℤ≥ ‘M) ⋀ k ∈ ℕ0) → ((N + k) + 1) =
(N + (k
+ 1))) |
| 9 | 8 | ancoms 438 |
. . . . . . 7
⊢ ((k ∈ ℕ0 ⋀
N ∈
(ℤ≥ ‘M)) → ((N +
k) + 1) = (N + (k +
1))) |
| 10 | 9 | adantr 391 |
. . . . . 6
⊢ (((k ∈ ℕ0 ⋀
N ∈
(ℤ≥ ‘M)) ⋀ (N + k) ∈ (ℤ≥ ‘M)) → ((N +
k) + 1) = (N + (k +
1))) |
| 11 | | peano2uz 6448 |
. . . . . . 7
⊢ ((N + k) ∈ (ℤ≥ ‘M) → ((N +
k) + 1) ∈
(ℤ≥ ‘M)) |
| 12 | 11 | adantl 390 |
. . . . . 6
⊢ (((k ∈ ℕ0 ⋀
N ∈
(ℤ≥ ‘M)) ⋀ (N + k) ∈ (ℤ≥ ‘M)) → ((N +
k) + 1) ∈
(ℤ≥ ‘M)) |
| 13 | 10, 12 | eqeltrrd 1552 |
. . . . 5
⊢ (((k ∈ ℕ0 ⋀
N ∈
(ℤ≥ ‘M)) ⋀ (N + k) ∈ (ℤ≥ ‘M)) → (N +
(k + 1)) ∈ (ℤ≥ ‘M)) |
| 14 | 13 | exp31 378 |
. . . 4
⊢ (k ∈ ℕ0 → (N ∈ (ℤ≥ ‘M) → ((N +
k) ∈
(ℤ≥ ‘M) → (N +
(k + 1)) ∈ (ℤ≥ ‘M)))) |
| 15 | 14 | a2d 13 |
. . 3
⊢ (k ∈ ℕ0 → ((N ∈ (ℤ≥ ‘M) → (N +
k) ∈
(ℤ≥ ‘M)) → (N
∈ (ℤ≥ ‘M) → (N +
(k + 1)) ∈ (ℤ≥ ‘M)))) |
| 16 | | ax0id 5293 |
. . . . . 6
⊢ (N ∈ ℂ → (N +
0) = N) |
| 17 | 6, 16 | syl 10 |
. . . . 5
⊢ (N ∈ (ℤ≥ ‘M) → (N +
0) = N) |
| 18 | 17 | eleq1d 1543 |
. . . 4
⊢ (N ∈ (ℤ≥ ‘M) → ((N +
0) ∈ (ℤ≥ ‘M) ↔ N
∈ (ℤ≥ ‘M))) |
| 19 | 18 | ibir 595 |
. . 3
⊢ (N ∈ (ℤ≥ ‘M) → (N +
0) ∈ (ℤ≥ ‘M)) |
| 20 | | opreq2 3975 |
. . . . 5
⊢ (j = 0 → (N
+ j) = (N + 0)) |
| 21 | 20 | eleq1d 1543 |
. . . 4
⊢ (j = 0 → ((N
+ j) ∈
(ℤ≥ ‘M) ↔ (N +
0) ∈ (ℤ≥ ‘M))) |
| 22 | 21 | imbi2d 614 |
. . 3
⊢ (j = 0 → ((N
∈ (ℤ≥ ‘M) → (N +
j) ∈
(ℤ≥ ‘M)) ↔ (N
∈ (ℤ≥ ‘M) → (N +
0) ∈ (ℤ≥ ‘M)))) |
| 23 | | opreq2 3975 |
. . . . 5
⊢ (j = k →
(N + j)
= (N + k)) |
| 24 | 23 | eleq1d 1543 |
. . . 4
⊢ (j = k →
((N + j) ∈ (ℤ≥ ‘M) ↔ (N +
k) ∈
(ℤ≥ ‘M))) |
| 25 | 24 | imbi2d 614 |
. . 3
⊢ (j = k →
((N ∈
(ℤ≥ ‘M) → (N +
j) ∈
(ℤ≥ ‘M)) ↔ (N
∈ (ℤ≥ ‘M) → (N +
k) ∈
(ℤ≥ ‘M)))) |
| 26 | | opreq2 3975 |
. . . . 5
⊢ (j = (k + 1)
→ (N + j) = (N +
(k + 1))) |
| 27 | 26 | eleq1d 1543 |
. . . 4
⊢ (j = (k + 1)
→ ((N + j) ∈ (ℤ≥ ‘M) ↔ (N +
(k + 1)) ∈ (ℤ≥ ‘M))) |
| 28 | 27 | imbi2d 614 |
. . 3
⊢ (j = (k + 1)
→ ((N ∈ (ℤ≥ ‘M) → (N +
j) ∈
(ℤ≥ ‘M)) ↔ (N
∈ (ℤ≥ ‘M) → (N +
(k + 1)) ∈ (ℤ≥ ‘M)))) |
| 29 | | opreq2 3975 |
. . . . 5
⊢ (j = K →
(N + j)
= (N + K)) |
| 30 | 29 | eleq1d 1543 |
. . . 4
⊢ (j = K →
((N + j) ∈ (ℤ≥ ‘M) ↔ (N +
K) ∈
(ℤ≥ ‘M))) |
| 31 | 30 | imbi2d 614 |
. . 3
⊢ (j = K →
((N ∈
(ℤ≥ ‘M) → (N +
j) ∈
(ℤ≥ ‘M)) ↔ (N
∈ (ℤ≥ ‘M) → (N +
K) ∈
(ℤ≥ ‘M)))) |
| 32 | 15, 19, 22, 25, 28, 31 | nn0indALT 6215 |
. 2
⊢ (K ∈ ℕ0 → (N ∈ (ℤ≥ ‘M) → (N +
K) ∈
(ℤ≥ ‘M))) |
| 33 | 32 | impcom 351 |
1
⊢ ((N ∈ (ℤ≥ ‘M) ⋀ K ∈ ℕ0) → (N + K) ∈ (ℤ≥ ‘M)) |