Proof of Theorem preimaleiinlt
| Step | Hyp | Ref
| Expression |
| 1 | | preimaleiinlt.x |
. . . 4
⊢
Ⅎ𝑥𝜑 |
| 2 | | simpllr 775 |
. . . . . . . 8
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) ∧ 𝑛 ∈ ℕ) → 𝑥 ∈ 𝐴) |
| 3 | | preimaleiinlt.b |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈
ℝ*) |
| 4 | 3 | ad2antrr 726 |
. . . . . . . . 9
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) ∧ 𝑛 ∈ ℕ) → 𝐵 ∈
ℝ*) |
| 5 | | preimaleiinlt.c |
. . . . . . . . . . 11
⊢ (𝜑 → 𝐶 ∈ ℝ) |
| 6 | 5 | ad3antrrr 730 |
. . . . . . . . . 10
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) ∧ 𝑛 ∈ ℕ) → 𝐶 ∈ ℝ) |
| 7 | 6 | rexrd 11180 |
. . . . . . . . 9
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) ∧ 𝑛 ∈ ℕ) → 𝐶 ∈
ℝ*) |
| 8 | 5 | adantr 480 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝐶 ∈ ℝ) |
| 9 | | nnrecre 12185 |
. . . . . . . . . . . . 13
⊢ (𝑛 ∈ ℕ → (1 /
𝑛) ∈
ℝ) |
| 10 | 9 | adantl 481 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (1 / 𝑛) ∈
ℝ) |
| 11 | 8, 10 | readdcld 11159 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝐶 + (1 / 𝑛)) ∈ ℝ) |
| 12 | 11 | ad4ant14 752 |
. . . . . . . . . 10
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) ∧ 𝑛 ∈ ℕ) → (𝐶 + (1 / 𝑛)) ∈ ℝ) |
| 13 | 12 | rexrd 11180 |
. . . . . . . . 9
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) ∧ 𝑛 ∈ ℕ) → (𝐶 + (1 / 𝑛)) ∈
ℝ*) |
| 14 | | simplr 768 |
. . . . . . . . 9
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) ∧ 𝑛 ∈ ℕ) → 𝐵 ≤ 𝐶) |
| 15 | | nnrecrp 45572 |
. . . . . . . . . . . 12
⊢ (𝑛 ∈ ℕ → (1 /
𝑛) ∈
ℝ+) |
| 16 | 15 | adantl 481 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (1 / 𝑛) ∈
ℝ+) |
| 17 | 8, 16 | ltaddrpd 12980 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝐶 < (𝐶 + (1 / 𝑛))) |
| 18 | 17 | ad4ant14 752 |
. . . . . . . . 9
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) ∧ 𝑛 ∈ ℕ) → 𝐶 < (𝐶 + (1 / 𝑛))) |
| 19 | 4, 7, 13, 14, 18 | xrlelttrd 13072 |
. . . . . . . 8
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) ∧ 𝑛 ∈ ℕ) → 𝐵 < (𝐶 + (1 / 𝑛))) |
| 20 | 2, 19 | rabidd 45341 |
. . . . . . 7
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) ∧ 𝑛 ∈ ℕ) → 𝑥 ∈ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))}) |
| 21 | 20 | ralrimiva 3126 |
. . . . . 6
⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) → ∀𝑛 ∈ ℕ 𝑥 ∈ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))}) |
| 22 | | eliin 4949 |
. . . . . . 7
⊢ (𝑥 ∈ V → (𝑥 ∈ ∩ 𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))} ↔ ∀𝑛 ∈ ℕ 𝑥 ∈ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))})) |
| 23 | 22 | elv 3443 |
. . . . . 6
⊢ (𝑥 ∈ ∩ 𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))} ↔ ∀𝑛 ∈ ℕ 𝑥 ∈ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))}) |
| 24 | 21, 23 | sylibr 234 |
. . . . 5
⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝐵 ≤ 𝐶) → 𝑥 ∈ ∩
𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))}) |
| 25 | 24 | ex 412 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐵 ≤ 𝐶 → 𝑥 ∈ ∩
𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))})) |
| 26 | 1, 25 | ralrimia 3233 |
. . 3
⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐵 ≤ 𝐶 → 𝑥 ∈ ∩
𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))})) |
| 27 | | nfcv 2896 |
. . . . 5
⊢
Ⅎ𝑥ℕ |
| 28 | | nfrab1 3417 |
. . . . 5
⊢
Ⅎ𝑥{𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))} |
| 29 | 27, 28 | nfiin 4977 |
. . . 4
⊢
Ⅎ𝑥∩ 𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))} |
| 30 | 29 | rabssf 45305 |
. . 3
⊢ ({𝑥 ∈ 𝐴 ∣ 𝐵 ≤ 𝐶} ⊆ ∩ 𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))} ↔ ∀𝑥 ∈ 𝐴 (𝐵 ≤ 𝐶 → 𝑥 ∈ ∩
𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))})) |
| 31 | 26, 30 | sylibr 234 |
. 2
⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 ≤ 𝐶} ⊆ ∩ 𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))}) |
| 32 | | nnn0 45564 |
. . . 4
⊢ ℕ
≠ ∅ |
| 33 | | iinrab 5022 |
. . . 4
⊢ (ℕ
≠ ∅ → ∩ 𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))} = {𝑥 ∈ 𝐴 ∣ ∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛))}) |
| 34 | 32, 33 | mp1i 13 |
. . 3
⊢ (𝜑 → ∩ 𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))} = {𝑥 ∈ 𝐴 ∣ ∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛))}) |
| 35 | 3 | ad2antrr 726 |
. . . . . . . . . 10
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑛 ∈ ℕ) ∧ 𝐵 < (𝐶 + (1 / 𝑛))) → 𝐵 ∈
ℝ*) |
| 36 | 11 | ad4ant13 751 |
. . . . . . . . . . 11
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑛 ∈ ℕ) ∧ 𝐵 < (𝐶 + (1 / 𝑛))) → (𝐶 + (1 / 𝑛)) ∈ ℝ) |
| 37 | 36 | rexrd 11180 |
. . . . . . . . . 10
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑛 ∈ ℕ) ∧ 𝐵 < (𝐶 + (1 / 𝑛))) → (𝐶 + (1 / 𝑛)) ∈
ℝ*) |
| 38 | | simpr 484 |
. . . . . . . . . 10
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑛 ∈ ℕ) ∧ 𝐵 < (𝐶 + (1 / 𝑛))) → 𝐵 < (𝐶 + (1 / 𝑛))) |
| 39 | 35, 37, 38 | xrltled 13062 |
. . . . . . . . 9
⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑛 ∈ ℕ) ∧ 𝐵 < (𝐶 + (1 / 𝑛))) → 𝐵 ≤ (𝐶 + (1 / 𝑛))) |
| 40 | 39 | ex 412 |
. . . . . . . 8
⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑛 ∈ ℕ) → (𝐵 < (𝐶 + (1 / 𝑛)) → 𝐵 ≤ (𝐶 + (1 / 𝑛)))) |
| 41 | 40 | ralimdva 3146 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛)) → ∀𝑛 ∈ ℕ 𝐵 ≤ (𝐶 + (1 / 𝑛)))) |
| 42 | 41 | imp 406 |
. . . . . 6
⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ ∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛))) → ∀𝑛 ∈ ℕ 𝐵 ≤ (𝐶 + (1 / 𝑛))) |
| 43 | | nfv 1915 |
. . . . . . . 8
⊢
Ⅎ𝑛(𝜑 ∧ 𝑥 ∈ 𝐴) |
| 44 | | nfra1 3258 |
. . . . . . . 8
⊢
Ⅎ𝑛∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛)) |
| 45 | 43, 44 | nfan 1900 |
. . . . . . 7
⊢
Ⅎ𝑛((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ ∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛))) |
| 46 | 3 | adantr 480 |
. . . . . . 7
⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ ∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛))) → 𝐵 ∈
ℝ*) |
| 47 | 5 | ad2antrr 726 |
. . . . . . 7
⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ ∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛))) → 𝐶 ∈ ℝ) |
| 48 | 45, 46, 47 | xrralrecnnle 45569 |
. . . . . 6
⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ ∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛))) → (𝐵 ≤ 𝐶 ↔ ∀𝑛 ∈ ℕ 𝐵 ≤ (𝐶 + (1 / 𝑛)))) |
| 49 | 42, 48 | mpbird 257 |
. . . . 5
⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ ∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛))) → 𝐵 ≤ 𝐶) |
| 50 | 49 | ex 412 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛)) → 𝐵 ≤ 𝐶)) |
| 51 | 1, 50 | ss2rabdf 45336 |
. . 3
⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ ∀𝑛 ∈ ℕ 𝐵 < (𝐶 + (1 / 𝑛))} ⊆ {𝑥 ∈ 𝐴 ∣ 𝐵 ≤ 𝐶}) |
| 52 | 34, 51 | eqsstrd 3966 |
. 2
⊢ (𝜑 → ∩ 𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))} ⊆ {𝑥 ∈ 𝐴 ∣ 𝐵 ≤ 𝐶}) |
| 53 | 31, 52 | eqssd 3949 |
1
⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 ≤ 𝐶} = ∩
𝑛 ∈ ℕ {𝑥 ∈ 𝐴 ∣ 𝐵 < (𝐶 + (1 / 𝑛))}) |