| Step | Hyp | Ref
| Expression |
| 1 | | elfzo2nn 47774 |
. . 3
⊢ (𝑀 ∈ (2..^𝑁) → 𝑀 ∈ ℕ) |
| 2 | | nndivides 16220 |
. . 3
⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑀 ∥ 𝑁 ↔ ∃𝑛 ∈ ℕ (𝑛 · 𝑀) = 𝑁)) |
| 3 | 1, 2 | sylan 581 |
. 2
⊢ ((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) → (𝑀 ∥ 𝑁 ↔ ∃𝑛 ∈ ℕ (𝑛 · 𝑀) = 𝑁)) |
| 4 | | oveq1 7365 |
. . . . . 6
⊢ (𝑛 = 𝑚 → (𝑛 · 𝑀) = (𝑚 · 𝑀)) |
| 5 | 4 | eqeq1d 2739 |
. . . . 5
⊢ (𝑛 = 𝑚 → ((𝑛 · 𝑀) = 𝑁 ↔ (𝑚 · 𝑀) = 𝑁)) |
| 6 | 5 | cbvrexvw 3217 |
. . . 4
⊢
(∃𝑛 ∈
ℕ (𝑛 · 𝑀) = 𝑁 ↔ ∃𝑚 ∈ ℕ (𝑚 · 𝑀) = 𝑁) |
| 7 | | simplll 775 |
. . . . . . . 8
⊢ ((((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) → 𝑀 ∈ (2..^𝑁)) |
| 8 | | simpr 484 |
. . . . . . . . 9
⊢ (((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) → 𝑚 ∈ ℕ) |
| 9 | 8 | adantr 480 |
. . . . . . . 8
⊢ ((((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) → 𝑚 ∈ ℕ) |
| 10 | 1 | adantr 480 |
. . . . . . . . . . . 12
⊢ ((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) → 𝑀 ∈ ℕ) |
| 11 | 10 | anim1i 616 |
. . . . . . . . . . 11
⊢ (((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) → (𝑀 ∈ ℕ ∧ 𝑚 ∈ ℕ)) |
| 12 | 11 | adantr 480 |
. . . . . . . . . 10
⊢ ((((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) → (𝑀 ∈ ℕ ∧ 𝑚 ∈ ℕ)) |
| 13 | | nnmulcom 12224 |
. . . . . . . . . 10
⊢ ((𝑀 ∈ ℕ ∧ 𝑚 ∈ ℕ) → (𝑀 · 𝑚) = (𝑚 · 𝑀)) |
| 14 | 12, 13 | syl 17 |
. . . . . . . . 9
⊢ ((((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) → (𝑀 · 𝑚) = (𝑚 · 𝑀)) |
| 15 | | simpr 484 |
. . . . . . . . 9
⊢ ((((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) → (𝑚 · 𝑀) = 𝑁) |
| 16 | 14, 15 | eqtrd 2772 |
. . . . . . . 8
⊢ ((((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) → (𝑀 · 𝑚) = 𝑁) |
| 17 | | nnmul2 47775 |
. . . . . . . 8
⊢ ((𝑀 ∈ (2..^𝑁) ∧ 𝑚 ∈ ℕ ∧ (𝑀 · 𝑚) = 𝑁) → 𝑚 ∈ (2..^𝑁)) |
| 18 | 7, 9, 16, 17 | syl3anc 1374 |
. . . . . . 7
⊢ ((((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) → 𝑚 ∈ (2..^𝑁)) |
| 19 | | simpr 484 |
. . . . . . . 8
⊢
(((((𝑀 ∈
(2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) ∧ 𝑚 ∈ (2..^𝑁)) → 𝑚 ∈ (2..^𝑁)) |
| 20 | 5 | adantl 481 |
. . . . . . . 8
⊢
((((((𝑀 ∈
(2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) ∧ 𝑚 ∈ (2..^𝑁)) ∧ 𝑛 = 𝑚) → ((𝑛 · 𝑀) = 𝑁 ↔ (𝑚 · 𝑀) = 𝑁)) |
| 21 | 15 | adantr 480 |
. . . . . . . 8
⊢
(((((𝑀 ∈
(2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) ∧ 𝑚 ∈ (2..^𝑁)) → (𝑚 · 𝑀) = 𝑁) |
| 22 | 19, 20, 21 | rspcedvd 3567 |
. . . . . . 7
⊢
(((((𝑀 ∈
(2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) ∧ 𝑚 ∈ (2..^𝑁)) → ∃𝑛 ∈ (2..^𝑁)(𝑛 · 𝑀) = 𝑁) |
| 23 | 18, 22 | mpdan 688 |
. . . . . 6
⊢ ((((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) ∧ (𝑚 · 𝑀) = 𝑁) → ∃𝑛 ∈ (2..^𝑁)(𝑛 · 𝑀) = 𝑁) |
| 24 | 23 | ex 412 |
. . . . 5
⊢ (((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) ∧ 𝑚 ∈ ℕ) → ((𝑚 · 𝑀) = 𝑁 → ∃𝑛 ∈ (2..^𝑁)(𝑛 · 𝑀) = 𝑁)) |
| 25 | 24 | rexlimdva 3139 |
. . . 4
⊢ ((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) → (∃𝑚 ∈ ℕ (𝑚 · 𝑀) = 𝑁 → ∃𝑛 ∈ (2..^𝑁)(𝑛 · 𝑀) = 𝑁)) |
| 26 | 6, 25 | biimtrid 242 |
. . 3
⊢ ((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) → (∃𝑛 ∈ ℕ (𝑛 · 𝑀) = 𝑁 → ∃𝑛 ∈ (2..^𝑁)(𝑛 · 𝑀) = 𝑁)) |
| 27 | | fzossnn 13655 |
. . . . 5
⊢
(1..^𝑁) ⊆
ℕ |
| 28 | | 2eluzge1 12821 |
. . . . . . 7
⊢ 2 ∈
(ℤ≥‘1) |
| 29 | | fzoss1 13630 |
. . . . . . 7
⊢ (2 ∈
(ℤ≥‘1) → (2..^𝑁) ⊆ (1..^𝑁)) |
| 30 | 28, 29 | mp1i 13 |
. . . . . 6
⊢
((1..^𝑁) ⊆
ℕ → (2..^𝑁)
⊆ (1..^𝑁)) |
| 31 | | id 22 |
. . . . . 6
⊢
((1..^𝑁) ⊆
ℕ → (1..^𝑁)
⊆ ℕ) |
| 32 | 30, 31 | sstrd 3933 |
. . . . 5
⊢
((1..^𝑁) ⊆
ℕ → (2..^𝑁)
⊆ ℕ) |
| 33 | 27, 32 | ax-mp 5 |
. . . 4
⊢
(2..^𝑁) ⊆
ℕ |
| 34 | | ssrexv 3992 |
. . . 4
⊢
((2..^𝑁) ⊆
ℕ → (∃𝑛
∈ (2..^𝑁)(𝑛 · 𝑀) = 𝑁 → ∃𝑛 ∈ ℕ (𝑛 · 𝑀) = 𝑁)) |
| 35 | 33, 34 | mp1i 13 |
. . 3
⊢ ((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) → (∃𝑛 ∈ (2..^𝑁)(𝑛 · 𝑀) = 𝑁 → ∃𝑛 ∈ ℕ (𝑛 · 𝑀) = 𝑁)) |
| 36 | 26, 35 | impbid 212 |
. 2
⊢ ((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) → (∃𝑛 ∈ ℕ (𝑛 · 𝑀) = 𝑁 ↔ ∃𝑛 ∈ (2..^𝑁)(𝑛 · 𝑀) = 𝑁)) |
| 37 | 3, 36 | bitrd 279 |
1
⊢ ((𝑀 ∈ (2..^𝑁) ∧ 𝑁 ∈ ℕ) → (𝑀 ∥ 𝑁 ↔ ∃𝑛 ∈ (2..^𝑁)(𝑛 · 𝑀) = 𝑁)) |