| Step | Hyp | Ref
| Expression |
| 1 | | 1sdom2 9248 |
. . 3
⊢
1o ≺ 2o |
| 2 | | djuxpdom 10200 |
. . 3
⊢
((1o ≺ 𝐴 ∧ 1o ≺ 2o)
→ (𝐴 ⊔
2o) ≼ (𝐴
× 2o)) |
| 3 | 1, 2 | mpan2 691 |
. 2
⊢
(1o ≺ 𝐴 → (𝐴 ⊔ 2o) ≼ (𝐴 ×
2o)) |
| 4 | | sdom0 9122 |
. . . . . 6
⊢ ¬
1o ≺ ∅ |
| 5 | | breq2 5123 |
. . . . . 6
⊢ (𝐴 = ∅ → (1o
≺ 𝐴 ↔
1o ≺ ∅)) |
| 6 | 4, 5 | mtbiri 327 |
. . . . 5
⊢ (𝐴 = ∅ → ¬
1o ≺ 𝐴) |
| 7 | 6 | con2i 139 |
. . . 4
⊢
(1o ≺ 𝐴 → ¬ 𝐴 = ∅) |
| 8 | | neq0 4327 |
. . . 4
⊢ (¬
𝐴 = ∅ ↔
∃𝑥 𝑥 ∈ 𝐴) |
| 9 | 7, 8 | sylib 218 |
. . 3
⊢
(1o ≺ 𝐴 → ∃𝑥 𝑥 ∈ 𝐴) |
| 10 | | relsdom 8966 |
. . . . . . . . . 10
⊢ Rel
≺ |
| 11 | 10 | brrelex2i 5711 |
. . . . . . . . 9
⊢
(1o ≺ 𝐴 → 𝐴 ∈ V) |
| 12 | 11 | adantr 480 |
. . . . . . . 8
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → 𝐴 ∈ V) |
| 13 | | enrefg 8998 |
. . . . . . . 8
⊢ (𝐴 ∈ V → 𝐴 ≈ 𝐴) |
| 14 | 12, 13 | syl 17 |
. . . . . . 7
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → 𝐴 ≈ 𝐴) |
| 15 | | df2o2 8489 |
. . . . . . . . 9
⊢
2o = {∅, {∅}} |
| 16 | | pwpw0 4789 |
. . . . . . . . 9
⊢ 𝒫
{∅} = {∅, {∅}} |
| 17 | 15, 16 | eqtr4i 2761 |
. . . . . . . 8
⊢
2o = 𝒫 {∅} |
| 18 | | 0ex 5277 |
. . . . . . . . . 10
⊢ ∅
∈ V |
| 19 | | vex 3463 |
. . . . . . . . . 10
⊢ 𝑥 ∈ V |
| 20 | | en2sn 9055 |
. . . . . . . . . 10
⊢ ((∅
∈ V ∧ 𝑥 ∈ V)
→ {∅} ≈ {𝑥}) |
| 21 | 18, 19, 20 | mp2an 692 |
. . . . . . . . 9
⊢ {∅}
≈ {𝑥} |
| 22 | | pwen 9164 |
. . . . . . . . 9
⊢
({∅} ≈ {𝑥} → 𝒫 {∅} ≈
𝒫 {𝑥}) |
| 23 | 21, 22 | ax-mp 5 |
. . . . . . . 8
⊢ 𝒫
{∅} ≈ 𝒫 {𝑥} |
| 24 | 17, 23 | eqbrtri 5140 |
. . . . . . 7
⊢
2o ≈ 𝒫 {𝑥} |
| 25 | | xpen 9154 |
. . . . . . 7
⊢ ((𝐴 ≈ 𝐴 ∧ 2o ≈ 𝒫
{𝑥}) → (𝐴 × 2o) ≈
(𝐴 × 𝒫 {𝑥})) |
| 26 | 14, 24, 25 | sylancl 586 |
. . . . . 6
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → (𝐴 × 2o) ≈ (𝐴 × 𝒫 {𝑥})) |
| 27 | | vsnex 5404 |
. . . . . . . 8
⊢ {𝑥} ∈ V |
| 28 | 27 | pwex 5350 |
. . . . . . 7
⊢ 𝒫
{𝑥} ∈
V |
| 29 | | uncom 4133 |
. . . . . . . . 9
⊢ ((𝐴 ∖ {𝑥}) ∪ {𝑥}) = ({𝑥} ∪ (𝐴 ∖ {𝑥})) |
| 30 | | simpr 484 |
. . . . . . . . . . 11
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ 𝐴) |
| 31 | 30 | snssd 4785 |
. . . . . . . . . 10
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → {𝑥} ⊆ 𝐴) |
| 32 | | undif 4457 |
. . . . . . . . . 10
⊢ ({𝑥} ⊆ 𝐴 ↔ ({𝑥} ∪ (𝐴 ∖ {𝑥})) = 𝐴) |
| 33 | 31, 32 | sylib 218 |
. . . . . . . . 9
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → ({𝑥} ∪ (𝐴 ∖ {𝑥})) = 𝐴) |
| 34 | 29, 33 | eqtrid 2782 |
. . . . . . . 8
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → ((𝐴 ∖ {𝑥}) ∪ {𝑥}) = 𝐴) |
| 35 | 12 | difexd 5301 |
. . . . . . . . 9
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → (𝐴 ∖ {𝑥}) ∈ V) |
| 36 | | canth2g 9145 |
. . . . . . . . 9
⊢ ((𝐴 ∖ {𝑥}) ∈ V → (𝐴 ∖ {𝑥}) ≺ 𝒫 (𝐴 ∖ {𝑥})) |
| 37 | | domunsn 9141 |
. . . . . . . . 9
⊢ ((𝐴 ∖ {𝑥}) ≺ 𝒫 (𝐴 ∖ {𝑥}) → ((𝐴 ∖ {𝑥}) ∪ {𝑥}) ≼ 𝒫 (𝐴 ∖ {𝑥})) |
| 38 | 35, 36, 37 | 3syl 18 |
. . . . . . . 8
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → ((𝐴 ∖ {𝑥}) ∪ {𝑥}) ≼ 𝒫 (𝐴 ∖ {𝑥})) |
| 39 | 34, 38 | eqbrtrrd 5143 |
. . . . . . 7
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → 𝐴 ≼ 𝒫 (𝐴 ∖ {𝑥})) |
| 40 | | xpdom1g 9083 |
. . . . . . 7
⊢
((𝒫 {𝑥}
∈ V ∧ 𝐴 ≼
𝒫 (𝐴 ∖ {𝑥})) → (𝐴 × 𝒫 {𝑥}) ≼ (𝒫 (𝐴 ∖ {𝑥}) × 𝒫 {𝑥})) |
| 41 | 28, 39, 40 | sylancr 587 |
. . . . . 6
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → (𝐴 × 𝒫 {𝑥}) ≼ (𝒫 (𝐴 ∖ {𝑥}) × 𝒫 {𝑥})) |
| 42 | | endomtr 9026 |
. . . . . 6
⊢ (((𝐴 × 2o) ≈
(𝐴 × 𝒫 {𝑥}) ∧ (𝐴 × 𝒫 {𝑥}) ≼ (𝒫 (𝐴 ∖ {𝑥}) × 𝒫 {𝑥})) → (𝐴 × 2o) ≼ (𝒫
(𝐴 ∖ {𝑥}) × 𝒫 {𝑥})) |
| 43 | 26, 41, 42 | syl2anc 584 |
. . . . 5
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → (𝐴 × 2o) ≼ (𝒫
(𝐴 ∖ {𝑥}) × 𝒫 {𝑥})) |
| 44 | | pwdjuen 10196 |
. . . . . . 7
⊢ (((𝐴 ∖ {𝑥}) ∈ V ∧ {𝑥} ∈ V) → 𝒫 ((𝐴 ∖ {𝑥}) ⊔ {𝑥}) ≈ (𝒫 (𝐴 ∖ {𝑥}) × 𝒫 {𝑥})) |
| 45 | 35, 27, 44 | sylancl 586 |
. . . . . 6
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → 𝒫 ((𝐴 ∖ {𝑥}) ⊔ {𝑥}) ≈ (𝒫 (𝐴 ∖ {𝑥}) × 𝒫 {𝑥})) |
| 46 | 45 | ensymd 9019 |
. . . . 5
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → (𝒫 (𝐴 ∖ {𝑥}) × 𝒫 {𝑥}) ≈ 𝒫 ((𝐴 ∖ {𝑥}) ⊔ {𝑥})) |
| 47 | | domentr 9027 |
. . . . 5
⊢ (((𝐴 × 2o) ≼
(𝒫 (𝐴 ∖
{𝑥}) × 𝒫
{𝑥}) ∧ (𝒫
(𝐴 ∖ {𝑥}) × 𝒫 {𝑥}) ≈ 𝒫 ((𝐴 ∖ {𝑥}) ⊔ {𝑥})) → (𝐴 × 2o) ≼ 𝒫
((𝐴 ∖ {𝑥}) ⊔ {𝑥})) |
| 48 | 43, 46, 47 | syl2anc 584 |
. . . 4
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → (𝐴 × 2o) ≼ 𝒫
((𝐴 ∖ {𝑥}) ⊔ {𝑥})) |
| 49 | 27 | a1i 11 |
. . . . . . 7
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → {𝑥} ∈ V) |
| 50 | | disjdifr 4448 |
. . . . . . . 8
⊢ ((𝐴 ∖ {𝑥}) ∩ {𝑥}) = ∅ |
| 51 | 50 | a1i 11 |
. . . . . . 7
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → ((𝐴 ∖ {𝑥}) ∩ {𝑥}) = ∅) |
| 52 | | endjudisj 10183 |
. . . . . . 7
⊢ (((𝐴 ∖ {𝑥}) ∈ V ∧ {𝑥} ∈ V ∧ ((𝐴 ∖ {𝑥}) ∩ {𝑥}) = ∅) → ((𝐴 ∖ {𝑥}) ⊔ {𝑥}) ≈ ((𝐴 ∖ {𝑥}) ∪ {𝑥})) |
| 53 | 35, 49, 51, 52 | syl3anc 1373 |
. . . . . 6
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → ((𝐴 ∖ {𝑥}) ⊔ {𝑥}) ≈ ((𝐴 ∖ {𝑥}) ∪ {𝑥})) |
| 54 | 53, 34 | breqtrd 5145 |
. . . . 5
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → ((𝐴 ∖ {𝑥}) ⊔ {𝑥}) ≈ 𝐴) |
| 55 | | pwen 9164 |
. . . . 5
⊢ (((𝐴 ∖ {𝑥}) ⊔ {𝑥}) ≈ 𝐴 → 𝒫 ((𝐴 ∖ {𝑥}) ⊔ {𝑥}) ≈ 𝒫 𝐴) |
| 56 | 54, 55 | syl 17 |
. . . 4
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → 𝒫 ((𝐴 ∖ {𝑥}) ⊔ {𝑥}) ≈ 𝒫 𝐴) |
| 57 | | domentr 9027 |
. . . 4
⊢ (((𝐴 × 2o) ≼
𝒫 ((𝐴 ∖
{𝑥}) ⊔ {𝑥}) ∧ 𝒫 ((𝐴 ∖ {𝑥}) ⊔ {𝑥}) ≈ 𝒫 𝐴) → (𝐴 × 2o) ≼ 𝒫
𝐴) |
| 58 | 48, 56, 57 | syl2anc 584 |
. . 3
⊢
((1o ≺ 𝐴 ∧ 𝑥 ∈ 𝐴) → (𝐴 × 2o) ≼ 𝒫
𝐴) |
| 59 | 9, 58 | exlimddv 1935 |
. 2
⊢
(1o ≺ 𝐴 → (𝐴 × 2o) ≼ 𝒫
𝐴) |
| 60 | | domtr 9021 |
. 2
⊢ (((𝐴 ⊔ 2o) ≼
(𝐴 × 2o)
∧ (𝐴 ×
2o) ≼ 𝒫 𝐴) → (𝐴 ⊔ 2o) ≼ 𝒫
𝐴) |
| 61 | 3, 59, 60 | syl2anc 584 |
1
⊢
(1o ≺ 𝐴 → (𝐴 ⊔ 2o) ≼ 𝒫
𝐴) |