Step | Hyp | Ref
| Expression |
1 | | breq1 5077 |
. . . . . . . 8
⊢ (𝑥 = 𝑦 → (𝑥 ≼ 𝐵 ↔ 𝑦 ≼ 𝐵)) |
2 | | eleq1 2826 |
. . . . . . . 8
⊢ (𝑥 = 𝑦 → (𝑥 ∈ 𝑈 ↔ 𝑦 ∈ 𝑈)) |
3 | 1, 2 | imbi12d 345 |
. . . . . . 7
⊢ (𝑥 = 𝑦 → ((𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈) ↔ (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈))) |
4 | 3 | imbi2d 341 |
. . . . . 6
⊢ (𝑥 = 𝑦 → (((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈)) ↔ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈)))) |
5 | | breq1 5077 |
. . . . . . . 8
⊢ (𝑥 = 𝐴 → (𝑥 ≼ 𝐵 ↔ 𝐴 ≼ 𝐵)) |
6 | | eleq1 2826 |
. . . . . . . 8
⊢ (𝑥 = 𝐴 → (𝑥 ∈ 𝑈 ↔ 𝐴 ∈ 𝑈)) |
7 | 5, 6 | imbi12d 345 |
. . . . . . 7
⊢ (𝑥 = 𝐴 → ((𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈) ↔ (𝐴 ≼ 𝐵 → 𝐴 ∈ 𝑈))) |
8 | 7 | imbi2d 341 |
. . . . . 6
⊢ (𝑥 = 𝐴 → (((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑥 ≼ 𝐵 → 𝑥 ∈ 𝑈)) ↔ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝐴 ≼ 𝐵 → 𝐴 ∈ 𝑈)))) |
9 | | r19.21v 3113 |
. . . . . . 7
⊢
(∀𝑦 ∈
𝑥 ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈)) ↔ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → ∀𝑦 ∈ 𝑥 (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈))) |
10 | | simpl1 1190 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → 𝑥 ∈ On) |
11 | | vex 3436 |
. . . . . . . . . . . . . . . . 17
⊢ 𝑥 ∈ V |
12 | | onelss 6308 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑥 ∈ On → (𝑦 ∈ 𝑥 → 𝑦 ⊆ 𝑥)) |
13 | 12 | imp 407 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝑥 ∈ On ∧ 𝑦 ∈ 𝑥) → 𝑦 ⊆ 𝑥) |
14 | | ssdomg 8786 |
. . . . . . . . . . . . . . . . 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 766 |
. . . . . . . . . . . . . . 15
⊢ ((((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) ∧ 𝑦 ∈ 𝑥) → 𝑥 ≼ 𝐵) |
18 | | domtr 8793 |
. . . . . . . . . . . . . . 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 3108 |
. . . . . . . . . . . 12
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → (∀𝑦 ∈ 𝑥 (𝑦 ≼ 𝐵 → 𝑦 ∈ 𝑈) → ∀𝑦 ∈ 𝑥 𝑦 ∈ 𝑈)) |
23 | | dfss3 3909 |
. . . . . . . . . . . . 13
⊢ (𝑥 ⊆ 𝑈 ↔ ∀𝑦 ∈ 𝑥 𝑦 ∈ 𝑈) |
24 | | domeng 8752 |
. . . . . . . . . . . . . . . 16
⊢ (𝐵 ∈ 𝑈 → (𝑥 ≼ 𝐵 ↔ ∃𝑦(𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵))) |
25 | 24 | 3ad2ant3 1134 |
. . . . . . . . . . . . . . 15
⊢ ((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑥 ≼ 𝐵 ↔ ∃𝑦(𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵))) |
26 | 25 | biimpa 477 |
. . . . . . . . . . . . . 14
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → ∃𝑦(𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵)) |
27 | | simpl2 1191 |
. . . . . . . . . . . . . . 15
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → 𝑈 ∈ Univ) |
28 | | gruss 10552 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈 ∧ 𝑦 ⊆ 𝐵) → 𝑦 ∈ 𝑈) |
29 | 28 | 3expia 1120 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑦 ⊆ 𝐵 → 𝑦 ∈ 𝑈)) |
30 | 29 | 3adant1 1129 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) → (𝑦 ⊆ 𝐵 → 𝑦 ∈ 𝑈)) |
31 | 30 | adantr 481 |
. . . . . . . . . . . . . . . . . 18
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → (𝑦 ⊆ 𝐵 → 𝑦 ∈ 𝑈)) |
32 | | ensym 8789 |
. . . . . . . . . . . . . . . . . 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 466 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → ((𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵) → (𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥))) |
35 | 34 | eximdv 1920 |
. . . . . . . . . . . . . . 15
⊢ (((𝑥 ∈ On ∧ 𝑈 ∈ Univ ∧ 𝐵 ∈ 𝑈) ∧ 𝑥 ≼ 𝐵) → (∃𝑦(𝑥 ≈ 𝑦 ∧ 𝑦 ⊆ 𝐵) → ∃𝑦(𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥))) |
36 | | gruen 10568 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝑈 ∈ Univ ∧ 𝑥 ⊆ 𝑈 ∧ (𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥)) → 𝑥 ∈ 𝑈) |
37 | 36 | 3com23 1125 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝑈 ∈ Univ ∧ (𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥) ∧ 𝑥 ⊆ 𝑈) → 𝑥 ∈ 𝑈) |
38 | 37 | 3exp 1118 |
. . . . . . . . . . . . . . . 16
⊢ (𝑈 ∈ Univ → ((𝑦 ∈ 𝑈 ∧ 𝑦 ≈ 𝑥) → (𝑥 ⊆ 𝑈 → 𝑥 ∈ 𝑈))) |
39 | 38 | exlimdv 1936 |
. . . . . . . . . . . . . . 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 | syl5bir 242 |
. . . . . . . . . . . 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 413 |
. . . . . . . . . 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 1121 |
. . . . . . . 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 | syl5bi 241 |
. . . . . 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 7704 |
. . . . 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 455 |
. . 3
⊢ ((𝑈 ∈ Univ ∧ (𝐵 ∈ 𝑈 ∧ 𝐴 ≼ 𝐵)) → (𝐴 ∈ On → 𝐴 ∈ 𝑈)) |
52 | 51 | 3impia 1116 |
. 2
⊢ ((𝑈 ∈ Univ ∧ (𝐵 ∈ 𝑈 ∧ 𝐴 ≼ 𝐵) ∧ 𝐴 ∈ On) → 𝐴 ∈ 𝑈) |
53 | 52 | 3com23 1125 |
1
⊢ ((𝑈 ∈ Univ ∧ 𝐴 ∈ On ∧ (𝐵 ∈ 𝑈 ∧ 𝐴 ≼ 𝐵)) → 𝐴 ∈ 𝑈) |