Step | Hyp | Ref
| Expression |
1 | | elpwi 4117 |
. . . . . . 7
⊢ (𝑠 ∈ 𝒫 {𝐴, 𝐵} → 𝑠 ⊆ {𝐴, 𝐵}) |
2 | | prfi 8120 |
. . . . . . . . 9
⊢ {𝐴, 𝐵} ∈ Fin |
3 | | ssfi 8065 |
. . . . . . . . 9
⊢ (({𝐴, 𝐵} ∈ Fin ∧ 𝑠 ⊆ {𝐴, 𝐵}) → 𝑠 ∈ Fin) |
4 | 2, 3 | mpan 702 |
. . . . . . . 8
⊢ (𝑠 ⊆ {𝐴, 𝐵} → 𝑠 ∈ Fin) |
5 | | hash2 13054 |
. . . . . . . . . . . . . 14
⊢
(#‘2𝑜) = 2 |
6 | 5 | eqcomi 2619 |
. . . . . . . . . . . . 13
⊢ 2 =
(#‘2𝑜) |
7 | 6 | a1i 11 |
. . . . . . . . . . . 12
⊢ (𝑠 ∈ Fin → 2 =
(#‘2𝑜)) |
8 | 7 | eqeq2d 2620 |
. . . . . . . . . . 11
⊢ (𝑠 ∈ Fin →
((#‘𝑠) = 2 ↔
(#‘𝑠) =
(#‘2𝑜))) |
9 | | 2onn 7607 |
. . . . . . . . . . . . 13
⊢
2𝑜 ∈ ω |
10 | | nnfi 8038 |
. . . . . . . . . . . . 13
⊢
(2𝑜 ∈ ω → 2𝑜
∈ Fin) |
11 | 9, 10 | ax-mp 5 |
. . . . . . . . . . . 12
⊢
2𝑜 ∈ Fin |
12 | | hashen 12997 |
. . . . . . . . . . . 12
⊢ ((𝑠 ∈ Fin ∧
2𝑜 ∈ Fin) → ((#‘𝑠) = (#‘2𝑜) ↔
𝑠 ≈
2𝑜)) |
13 | 11, 12 | mpan2 703 |
. . . . . . . . . . 11
⊢ (𝑠 ∈ Fin →
((#‘𝑠) =
(#‘2𝑜) ↔ 𝑠 ≈
2𝑜)) |
14 | 8, 13 | bitrd 267 |
. . . . . . . . . 10
⊢ (𝑠 ∈ Fin →
((#‘𝑠) = 2 ↔
𝑠 ≈
2𝑜)) |
15 | | hash2pwpr 13115 |
. . . . . . . . . . . 12
⊢
(((#‘𝑠) = 2
∧ 𝑠 ∈ 𝒫
{𝐴, 𝐵}) → 𝑠 = {𝐴, 𝐵}) |
16 | 15 | a1d 25 |
. . . . . . . . . . 11
⊢
(((#‘𝑠) = 2
∧ 𝑠 ∈ 𝒫
{𝐴, 𝐵}) → ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → 𝑠 = {𝐴, 𝐵})) |
17 | 16 | ex 449 |
. . . . . . . . . 10
⊢
((#‘𝑠) = 2
→ (𝑠 ∈ 𝒫
{𝐴, 𝐵} → ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → 𝑠 = {𝐴, 𝐵}))) |
18 | 14, 17 | syl6bir 243 |
. . . . . . . . 9
⊢ (𝑠 ∈ Fin → (𝑠 ≈ 2𝑜
→ (𝑠 ∈ 𝒫
{𝐴, 𝐵} → ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → 𝑠 = {𝐴, 𝐵})))) |
19 | 18 | com23 84 |
. . . . . . . 8
⊢ (𝑠 ∈ Fin → (𝑠 ∈ 𝒫 {𝐴, 𝐵} → (𝑠 ≈ 2𝑜 → ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → 𝑠 = {𝐴, 𝐵})))) |
20 | 4, 19 | syl 17 |
. . . . . . 7
⊢ (𝑠 ⊆ {𝐴, 𝐵} → (𝑠 ∈ 𝒫 {𝐴, 𝐵} → (𝑠 ≈ 2𝑜 → ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → 𝑠 = {𝐴, 𝐵})))) |
21 | 1, 20 | mpcom 37 |
. . . . . 6
⊢ (𝑠 ∈ 𝒫 {𝐴, 𝐵} → (𝑠 ≈ 2𝑜 → ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → 𝑠 = {𝐴, 𝐵}))) |
22 | 21 | imp 444 |
. . . . 5
⊢ ((𝑠 ∈ 𝒫 {𝐴, 𝐵} ∧ 𝑠 ≈ 2𝑜) →
((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → 𝑠 = {𝐴, 𝐵})) |
23 | 22 | com12 32 |
. . . 4
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → ((𝑠 ∈ 𝒫 {𝐴, 𝐵} ∧ 𝑠 ≈ 2𝑜) → 𝑠 = {𝐴, 𝐵})) |
24 | | prex 4836 |
. . . . . . . . . . . . 13
⊢ {𝐴, 𝐵} ∈ V |
25 | 24 | prid2 4242 |
. . . . . . . . . . . 12
⊢ {𝐴, 𝐵} ∈ {{𝐵}, {𝐴, 𝐵}} |
26 | 25 | a1i 11 |
. . . . . . . . . . 11
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → {𝐴, 𝐵} ∈ {{𝐵}, {𝐴, 𝐵}}) |
27 | 26 | olcd 407 |
. . . . . . . . . 10
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → ({𝐴, 𝐵} ∈ {∅, {𝐴}} ∨ {𝐴, 𝐵} ∈ {{𝐵}, {𝐴, 𝐵}})) |
28 | | elun 3715 |
. . . . . . . . . 10
⊢ ({𝐴, 𝐵} ∈ ({∅, {𝐴}} ∪ {{𝐵}, {𝐴, 𝐵}}) ↔ ({𝐴, 𝐵} ∈ {∅, {𝐴}} ∨ {𝐴, 𝐵} ∈ {{𝐵}, {𝐴, 𝐵}})) |
29 | 27, 28 | sylibr 223 |
. . . . . . . . 9
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → {𝐴, 𝐵} ∈ ({∅, {𝐴}} ∪ {{𝐵}, {𝐴, 𝐵}})) |
30 | | pwpr 4368 |
. . . . . . . . 9
⊢ 𝒫
{𝐴, 𝐵} = ({∅, {𝐴}} ∪ {{𝐵}, {𝐴, 𝐵}}) |
31 | 29, 30 | syl6eleqr 2699 |
. . . . . . . 8
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → {𝐴, 𝐵} ∈ 𝒫 {𝐴, 𝐵}) |
32 | 31 | adantr 480 |
. . . . . . 7
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) ∧ 𝑠 = {𝐴, 𝐵}) → {𝐴, 𝐵} ∈ 𝒫 {𝐴, 𝐵}) |
33 | | eleq1 2676 |
. . . . . . . 8
⊢ (𝑠 = {𝐴, 𝐵} → (𝑠 ∈ 𝒫 {𝐴, 𝐵} ↔ {𝐴, 𝐵} ∈ 𝒫 {𝐴, 𝐵})) |
34 | 33 | adantl 481 |
. . . . . . 7
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) ∧ 𝑠 = {𝐴, 𝐵}) → (𝑠 ∈ 𝒫 {𝐴, 𝐵} ↔ {𝐴, 𝐵} ∈ 𝒫 {𝐴, 𝐵})) |
35 | 32, 34 | mpbird 246 |
. . . . . 6
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) ∧ 𝑠 = {𝐴, 𝐵}) → 𝑠 ∈ 𝒫 {𝐴, 𝐵}) |
36 | | pr2nelem 8710 |
. . . . . . . 8
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → {𝐴, 𝐵} ≈
2𝑜) |
37 | 36 | adantr 480 |
. . . . . . 7
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) ∧ 𝑠 = {𝐴, 𝐵}) → {𝐴, 𝐵} ≈
2𝑜) |
38 | | breq1 4586 |
. . . . . . . 8
⊢ (𝑠 = {𝐴, 𝐵} → (𝑠 ≈ 2𝑜 ↔ {𝐴, 𝐵} ≈
2𝑜)) |
39 | 38 | adantl 481 |
. . . . . . 7
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) ∧ 𝑠 = {𝐴, 𝐵}) → (𝑠 ≈ 2𝑜 ↔ {𝐴, 𝐵} ≈
2𝑜)) |
40 | 37, 39 | mpbird 246 |
. . . . . 6
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) ∧ 𝑠 = {𝐴, 𝐵}) → 𝑠 ≈
2𝑜) |
41 | 35, 40 | jca 553 |
. . . . 5
⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) ∧ 𝑠 = {𝐴, 𝐵}) → (𝑠 ∈ 𝒫 {𝐴, 𝐵} ∧ 𝑠 ≈
2𝑜)) |
42 | 41 | ex 449 |
. . . 4
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → (𝑠 = {𝐴, 𝐵} → (𝑠 ∈ 𝒫 {𝐴, 𝐵} ∧ 𝑠 ≈
2𝑜))) |
43 | 23, 42 | impbid 201 |
. . 3
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → ((𝑠 ∈ 𝒫 {𝐴, 𝐵} ∧ 𝑠 ≈ 2𝑜) ↔ 𝑠 = {𝐴, 𝐵})) |
44 | | breq1 4586 |
. . . 4
⊢ (𝑝 = 𝑠 → (𝑝 ≈ 2𝑜 ↔ 𝑠 ≈
2𝑜)) |
45 | 44 | elrab 3331 |
. . 3
⊢ (𝑠 ∈ {𝑝 ∈ 𝒫 {𝐴, 𝐵} ∣ 𝑝 ≈ 2𝑜} ↔ (𝑠 ∈ 𝒫 {𝐴, 𝐵} ∧ 𝑠 ≈
2𝑜)) |
46 | | velsn 4141 |
. . 3
⊢ (𝑠 ∈ {{𝐴, 𝐵}} ↔ 𝑠 = {𝐴, 𝐵}) |
47 | 43, 45, 46 | 3bitr4g 302 |
. 2
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → (𝑠 ∈ {𝑝 ∈ 𝒫 {𝐴, 𝐵} ∣ 𝑝 ≈ 2𝑜} ↔ 𝑠 ∈ {{𝐴, 𝐵}})) |
48 | 47 | eqrdv 2608 |
1
⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐴 ≠ 𝐵) → {𝑝 ∈ 𝒫 {𝐴, 𝐵} ∣ 𝑝 ≈ 2𝑜} = {{𝐴, 𝐵}}) |