| Step | Hyp | Ref
| Expression |
| 1 | | oveq2 6049 |
. . 3
⊢ (𝑤 = ∅ → (𝐴 ↑𝑚
𝑤) = (𝐴 ↑𝑚
∅)) |
| 2 | 1 | eleq1d 2301 |
. 2
⊢ (𝑤 = ∅ → ((𝐴 ↑𝑚
𝑤) ∈ Fin ↔ (𝐴 ↑𝑚
∅) ∈ Fin)) |
| 3 | | oveq2 6049 |
. . 3
⊢ (𝑤 = 𝑦 → (𝐴 ↑𝑚 𝑤) = (𝐴 ↑𝑚 𝑦)) |
| 4 | 3 | eleq1d 2301 |
. 2
⊢ (𝑤 = 𝑦 → ((𝐴 ↑𝑚 𝑤) ∈ Fin ↔ (𝐴 ↑𝑚
𝑦) ∈
Fin)) |
| 5 | | oveq2 6049 |
. . 3
⊢ (𝑤 = (𝑦 ∪ {𝑧}) → (𝐴 ↑𝑚 𝑤) = (𝐴 ↑𝑚 (𝑦 ∪ {𝑧}))) |
| 6 | 5 | eleq1d 2301 |
. 2
⊢ (𝑤 = (𝑦 ∪ {𝑧}) → ((𝐴 ↑𝑚 𝑤) ∈ Fin ↔ (𝐴 ↑𝑚
(𝑦 ∪ {𝑧})) ∈
Fin)) |
| 7 | | oveq2 6049 |
. . 3
⊢ (𝑤 = 𝐵 → (𝐴 ↑𝑚 𝑤) = (𝐴 ↑𝑚 𝐵)) |
| 8 | 7 | eleq1d 2301 |
. 2
⊢ (𝑤 = 𝐵 → ((𝐴 ↑𝑚 𝑤) ∈ Fin ↔ (𝐴 ↑𝑚
𝐵) ∈
Fin)) |
| 9 | | mapdm0 6888 |
. . . 4
⊢ (𝐴 ∈ Fin → (𝐴 ↑𝑚
∅) = {∅}) |
| 10 | | 0ex 4230 |
. . . . 5
⊢ ∅
∈ V |
| 11 | | snfig 7047 |
. . . . 5
⊢ (∅
∈ V → {∅} ∈ Fin) |
| 12 | 10, 11 | ax-mp 5 |
. . . 4
⊢ {∅}
∈ Fin |
| 13 | 9, 12 | eqeltrdi 2323 |
. . 3
⊢ (𝐴 ∈ Fin → (𝐴 ↑𝑚
∅) ∈ Fin) |
| 14 | 13 | adantr 276 |
. 2
⊢ ((𝐴 ∈ Fin ∧ 𝐵 ∈ Fin) → (𝐴 ↑𝑚
∅) ∈ Fin) |
| 15 | | simpr 110 |
. . . . 5
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → (𝐴 ↑𝑚
𝑦) ∈
Fin) |
| 16 | | simp-4l 543 |
. . . . . 6
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → 𝐴 ∈ Fin) |
| 17 | | vex 2815 |
. . . . . . . 8
⊢ 𝑧 ∈ V |
| 18 | 17 | a1i 9 |
. . . . . . 7
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → 𝑧 ∈ V) |
| 19 | 16, 18 | mapsnend 7043 |
. . . . . 6
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → (𝐴 ↑𝑚
{𝑧}) ≈ 𝐴) |
| 20 | | enfii 7120 |
. . . . . 6
⊢ ((𝐴 ∈ Fin ∧ (𝐴 ↑𝑚
{𝑧}) ≈ 𝐴) → (𝐴 ↑𝑚 {𝑧}) ∈ Fin) |
| 21 | 16, 19, 20 | syl2anc 411 |
. . . . 5
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → (𝐴 ↑𝑚
{𝑧}) ∈
Fin) |
| 22 | | xpfi 7183 |
. . . . 5
⊢ (((𝐴 ↑𝑚
𝑦) ∈ Fin ∧ (𝐴 ↑𝑚
{𝑧}) ∈ Fin) →
((𝐴
↑𝑚 𝑦) × (𝐴 ↑𝑚 {𝑧})) ∈ Fin) |
| 23 | 15, 21, 22 | syl2anc 411 |
. . . 4
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → ((𝐴 ↑𝑚
𝑦) × (𝐴 ↑𝑚
{𝑧})) ∈
Fin) |
| 24 | | vex 2815 |
. . . . . 6
⊢ 𝑦 ∈ V |
| 25 | 24 | a1i 9 |
. . . . 5
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → 𝑦 ∈ V) |
| 26 | 17 | snex 4290 |
. . . . . 6
⊢ {𝑧} ∈ V |
| 27 | 26 | a1i 9 |
. . . . 5
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → {𝑧} ∈ V) |
| 28 | | simplrr 538 |
. . . . . . 7
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → 𝑧 ∈ (𝐵 ∖ 𝑦)) |
| 29 | 28 | eldifbd 3222 |
. . . . . 6
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → ¬ 𝑧 ∈ 𝑦) |
| 30 | | disjsn 3744 |
. . . . . 6
⊢ ((𝑦 ∩ {𝑧}) = ∅ ↔ ¬ 𝑧 ∈ 𝑦) |
| 31 | 29, 30 | sylibr 134 |
. . . . 5
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → (𝑦 ∩ {𝑧}) = ∅) |
| 32 | | mapunen 7095 |
. . . . 5
⊢ (((𝑦 ∈ V ∧ {𝑧} ∈ V ∧ 𝐴 ∈ Fin) ∧ (𝑦 ∩ {𝑧}) = ∅) → (𝐴 ↑𝑚 (𝑦 ∪ {𝑧})) ≈ ((𝐴 ↑𝑚 𝑦) × (𝐴 ↑𝑚 {𝑧}))) |
| 33 | 25, 27, 16, 31, 32 | syl31anc 1277 |
. . . 4
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → (𝐴 ↑𝑚
(𝑦 ∪ {𝑧})) ≈ ((𝐴 ↑𝑚 𝑦) × (𝐴 ↑𝑚 {𝑧}))) |
| 34 | | enfii 7120 |
. . . 4
⊢ ((((𝐴 ↑𝑚
𝑦) × (𝐴 ↑𝑚
{𝑧})) ∈ Fin ∧
(𝐴
↑𝑚 (𝑦 ∪ {𝑧})) ≈ ((𝐴 ↑𝑚 𝑦) × (𝐴 ↑𝑚 {𝑧}))) → (𝐴 ↑𝑚 (𝑦 ∪ {𝑧})) ∈ Fin) |
| 35 | 23, 33, 34 | syl2anc 411 |
. . 3
⊢
(((((𝐴 ∈ Fin
∧ 𝐵 ∈ Fin) ∧
𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) ∧ (𝐴 ↑𝑚 𝑦) ∈ Fin) → (𝐴 ↑𝑚
(𝑦 ∪ {𝑧})) ∈ Fin) |
| 36 | 35 | ex 115 |
. 2
⊢ ((((𝐴 ∈ Fin ∧ 𝐵 ∈ Fin) ∧ 𝑦 ∈ Fin) ∧ (𝑦 ⊆ 𝐵 ∧ 𝑧 ∈ (𝐵 ∖ 𝑦))) → ((𝐴 ↑𝑚 𝑦) ∈ Fin → (𝐴 ↑𝑚
(𝑦 ∪ {𝑧})) ∈
Fin)) |
| 37 | | simpr 110 |
. 2
⊢ ((𝐴 ∈ Fin ∧ 𝐵 ∈ Fin) → 𝐵 ∈ Fin) |
| 38 | 2, 4, 6, 8, 14, 36, 37 | findcard2sd 7140 |
1
⊢ ((𝐴 ∈ Fin ∧ 𝐵 ∈ Fin) → (𝐴 ↑𝑚
𝐵) ∈
Fin) |