| Step | Hyp | Ref
| Expression |
| 1 | | breq1 5146 |
. . . . . . . 8
⊢ (𝑥 = 𝑦 → (𝑥 ≼ 𝐵 ↔ 𝑦 ≼ 𝐵)) |
| 2 | | eleq1 2829 |
. . . . . . . 8
⊢ (𝑥 = 𝑦 → (𝑥 ∈ 𝑈 ↔ 𝑦 ∈ 𝑈)) |
| 3 | 1, 2 | imbi12d 344 |
. . . . . . 7
⊢ (𝑥 = 𝑦 → ((𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈) ↔ (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈))) |
| 4 | 3 | imbi2d 340 |
. . . . . 6
⊢ (𝑥 = 𝑦 → (((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈)) ↔ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈)))) |
| 5 | | breq1 5146 |
. . . . . . . 8
⊢ (𝑥 = 𝐴 → (𝑥 ≼ 𝐵 ↔ 𝐴 ≼ 𝐵)) |
| 6 | | eleq1 2829 |
. . . . . . . 8
⊢ (𝑥 = 𝐴 → (𝑥 ∈ 𝑈 ↔ 𝐴 ∈ 𝑈)) |
| 7 | 5, 6 | imbi12d 344 |
. . . . . . 7
⊢ (𝑥 = 𝐴 → ((𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈) ↔ (𝐴 ≼ 𝐵 → 𝐴 ∈ 𝑈))) |
| 8 | 7 | imbi2d 340 |
. . . . . 6
⊢ (𝑥 = 𝐴 → (((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈)) ↔ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝐴 ≼ 𝐵 → 𝐴 ∈ 𝑈)))) |
| 9 | | r19.21v 3180 |
. . . . . . 7
⊢
(∀𝑦 ∈
𝑥 ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈)) ↔ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → ∀𝑦 ∈ 𝑥 (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈))) |
| 10 | | simpl1 1192 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → 𝑥 ∈ On) |
| 11 | | vex 3484 |
. . . . . . . . . . . . . . . . 17
⊢ 𝑥 ∈ V |
| 12 | | onelss 6426 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑥 ∈ On → (𝑦 ∈ 𝑥 → 𝑦 ⊆ 𝑥)) |
| 13 | 12 | imp 406 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝑥 ∈ On ∧ 𝑦 ∈ 𝑥) → 𝑦 ⊆ 𝑥) |
| 14 | | ssdomg 9040 |
. . . . . . . . . . . . . . . . 17
⊢ (𝑥 ∈ V → (𝑦 ⊆ 𝑥 → 𝑦 ≼ 𝑥)) |
| 15 | 11, 13, 14 | mpsyl 68 |
. . . . . . . . . . . . . . . 16
⊢ ((𝑥 ∈ On ∧ 𝑦 ∈ 𝑥) → 𝑦 ≼ 𝑥) |
| 16 | 10, 15 | sylan 580 |
. . . . . . . . . . . . . . 15
⊢ ((((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) ∧ 𝑦 ∈ 𝑥) → 𝑦 ≼ 𝑥) |
| 17 | | simplr 769 |
. . . . . . . . . . . . . . 15
⊢ ((((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) ∧ 𝑦 ∈ 𝑥) → 𝑥 ≼ 𝐵) |
| 18 | | domtr 9047 |
. . . . . . . . . . . . . . 15
⊢ ((𝑦 ≼ 𝑥 ∧ 𝑥 ≼ 𝐵) → 𝑦 ≼ 𝐵) |
| 19 | 16, 17, 18 | syl2anc 584 |
. . . . . . . . . . . . . 14
⊢ ((((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) ∧ 𝑦 ∈ 𝑥) → 𝑦 ≼ 𝐵) |
| 20 | | pm2.27 42 |
. . . . . . . . . . . . . 14
⊢ (𝑦 ≼ 𝐵 → ((𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈) → 𝑦 ∈ 𝑈)) |
| 21 | 19, 20 | syl 17 |
. . . . . . . . . . . . 13
⊢ ((((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) ∧ 𝑦 ∈ 𝑥) → ((𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈) → 𝑦 ∈ 𝑈)) |
| 22 | 21 | ralimdva 3167 |
. . . . . . . . . . . 12
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → (∀𝑦 ∈ 𝑥 (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈) → ∀𝑦 ∈ 𝑥 𝑦 ∈ 𝑈)) |
| 23 | | dfss3 3972 |
. . . . . . . . . . . . 13
⊢ (𝑥 ⊆ 𝑈 ↔ ∀𝑦 ∈ 𝑥 𝑦 ∈ 𝑈) |
| 24 | | domeng 9003 |
. . . . . . . . . . . . . . . 16
⊢ (𝐵 ∈ 𝑈 → (𝑥 ≼ 𝐵 ↔ ∃𝑦(𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵))) |
| 25 | 24 | 3ad2ant3 1136 |
. . . . . . . . . . . . . . 15
⊢ ((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑥 ≼ 𝐵 ↔ ∃𝑦(𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵))) |
| 26 | 25 | biimpa 476 |
. . . . . . . . . . . . . 14
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → ∃𝑦(𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵)) |
| 27 | | simpl2 1193 |
. . . . . . . . . . . . . . 15
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → 𝑈 ∈ Univ) |
| 28 | | gruss 10836 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈 ∧ 𝑦 ⊆ 𝐵) → 𝑦 ∈ 𝑈) |
| 29 | 28 | 3expia 1122 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑦 ⊆ 𝐵 → 𝑦 ∈ 𝑈)) |
| 30 | 29 | 3adant1 1131 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑦 ⊆ 𝐵 → 𝑦 ∈ 𝑈)) |
| 31 | 30 | adantr 480 |
. . . . . . . . . . . . . . . . . 18
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → (𝑦 ⊆ 𝐵 → 𝑦 ∈ 𝑈)) |
| 32 | | ensym 9043 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑥 ≈ 𝑦 → 𝑦 ≈ 𝑥) |
| 33 | 31, 32 | anim12d1 610 |
. . . . . . . . . . . . . . . . 17
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → ((𝑦 ⊆ 𝐵 ∧ 𝑥 ≈ 𝑦) → (𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥))) |
| 34 | 33 | ancomsd 465 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → ((𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵) → (𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥))) |
| 35 | 34 | eximdv 1917 |
. . . . . . . . . . . . . . 15
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → (∃𝑦(𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵) → ∃𝑦(𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥))) |
| 36 | | gruen 10852 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝑈 ∈ Univ ∧ 𝑥 ⊆ 𝑈 ∧ (𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥)) → 𝑥 ∈ 𝑈) |
| 37 | 36 | 3com23 1127 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝑈 ∈ Univ ∧ (𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥) ∧ 𝑥 ⊆ 𝑈) → 𝑥 ∈ 𝑈) |
| 38 | 37 | 3exp 1120 |
. . . . . . . . . . . . . . . 16
⊢ (𝑈 ∈ Univ → ((𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥) → (𝑥 ⊆ 𝑈 → 𝑥 ∈ 𝑈))) |
| 39 | 38 | exlimdv 1933 |
. . . . . . . . . . . . . . 15
⊢ (𝑈 ∈ Univ →
(∃𝑦(𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥) → (𝑥 ⊆ 𝑈 → 𝑥 ∈ 𝑈))) |
| 40 | 27, 35, 39 | sylsyld 61 |
. . . . . . . . . . . . . 14
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → (∃𝑦(𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵) → (𝑥 ⊆ 𝑈 → 𝑥 ∈ 𝑈))) |
| 41 | 26, 40 | mpd 15 |
. . . . . . . . . . . . 13
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → (𝑥 ⊆ 𝑈 → 𝑥 ∈ 𝑈)) |
| 42 | 23, 41 | biimtrrid 243 |
. . . . . . . . . . . 12
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → (∀𝑦 ∈ 𝑥 𝑦 ∈ 𝑈 → 𝑥 ∈ 𝑈)) |
| 43 | 22, 42 | syld 47 |
. . . . . . . . . . 11
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → (∀𝑦 ∈ 𝑥 (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈) → 𝑥 ∈ 𝑈)) |
| 44 | 43 | ex 412 |
. . . . . . . . . 10
⊢ ((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑥 ≼ 𝐵 → (∀𝑦 ∈ 𝑥 (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈) → 𝑥 ∈ 𝑈))) |
| 45 | 44 | com23 86 |
. . . . . . . . 9
⊢ ((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (∀𝑦 ∈ 𝑥 (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈) → (𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈))) |
| 46 | 45 | 3expib 1123 |
. . . . . . . 8
⊢ (𝑥 ∈ On → ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (∀𝑦 ∈ 𝑥 (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈) → (𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈)))) |
| 47 | 46 | a2d 29 |
. . . . . . 7
⊢ (𝑥 ∈ On → (((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → ∀𝑦 ∈ 𝑥 (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈)) → ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈)))) |
| 48 | 9, 47 | biimtrid 242 |
. . . . . 6
⊢ (𝑥 ∈ On → (∀𝑦 ∈ 𝑥 ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈)) → ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈)))) |
| 49 | 4, 8, 48 | tfis3 7879 |
. . . . 5
⊢ (𝐴 ∈ On → ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝐴 ≼ 𝐵 → 𝐴 ∈ 𝑈))) |
| 50 | 49 | com3l 89 |
. . . 4
⊢ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝐴 ≼ 𝐵 → (𝐴 ∈ On → 𝐴 ∈ 𝑈))) |
| 51 | 50 | impr 454 |
. . 3
⊢ ((𝑈 ∈ Univ ∧ (𝐵 ∈ 𝑈 ∧ 𝐴 ≼ 𝐵)) → (𝐴 ∈ On → 𝐴 ∈ 𝑈)) |
| 52 | 51 | 3impia 1118 |
. 2
⊢ ((𝑈 ∈ Univ ∧ (𝐵 ∈ 𝑈 ∧ 𝐴 ≼ 𝐵) ∧ 𝐴 ∈ On) → 𝐴 ∈ 𝑈) |
| 53 | 52 | 3com23 1127 |
1
⊢ ((𝑈 ∈ Univ ∧ 𝐴 ∈ On ∧ (𝐵 ∈ 𝑈 ∧ 𝐴 ≼ 𝐵)) → 𝐴 ∈ 𝑈) |