Proof of Theorem inf3lem6
| Step | Hyp | Ref
| Expression |
| 1 | | inf3lem.1 |
. . . . . . . . . . . . . 14
⊢ G =
{〈y, z〉∣z
= {w ∈ x∣(w ∩
x) ⊆ y}} |
| 2 | | inf3lem.2 |
. . . . . . . . . . . . . 14
⊢ F =
(rec(G, ∅) ↾ ω) |
| 3 | | visset 1350 |
. . . . . . . . . . . . . 14
⊢ u
∈ V |
| 4 | | visset 1350 |
. . . . . . . . . . . . . 14
⊢ v
∈ V |
| 5 | 1, 2, 3, 4 | inf3lem5 3468 |
. . . . . . . . . . . . 13
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → ((u
∈ ω ∧ v ∈ u) → (F
‘v) ⊂ (F ‘u))) |
| 6 | | dfpss2 1557 |
. . . . . . . . . . . . . 14
⊢ ((F
‘v) ⊂ (F ‘u)
↔ ((F ‘v) ⊆ (F
‘u) ∧ ¬ (F ‘v) =
(F ‘u))) |
| 7 | 6 | pm3.27bd 263 |
. . . . . . . . . . . . 13
⊢ ((F
‘v) ⊂ (F ‘u)
→ ¬ (F ‘v) = (F
‘u)) |
| 8 | 5, 7 | syl6 23 |
. . . . . . . . . . . 12
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → ((u
∈ ω ∧ v ∈ u) → ¬ (F ‘v) =
(F ‘u))) |
| 9 | 8 | exp3a 292 |
. . . . . . . . . . 11
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → (u
∈ ω → (v ∈ u → ¬ (F ‘v) =
(F ‘u)))) |
| 10 | 9 | imp 277 |
. . . . . . . . . 10
⊢ (((¬ x = ∅ ∧ x ⊆ ∪x) ∧ u
∈ ω) → (v ∈ u → ¬ (F ‘v) =
(F ‘u))) |
| 11 | 10 | adantrl 311 |
. . . . . . . . 9
⊢ (((¬ x = ∅ ∧ x ⊆ ∪x) ∧ (v
∈ ω ∧ u ∈ ω))
→ (v ∈ u → ¬ (F ‘v) =
(F ‘u))) |
| 12 | 1, 2, 4, 3 | inf3lem5 3468 |
. . . . . . . . . . . . 13
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → ((v
∈ ω ∧ u ∈ v) → (F
‘u) ⊂ (F ‘v))) |
| 13 | | dfpss2 1557 |
. . . . . . . . . . . . . . 15
⊢ ((F
‘u) ⊂ (F ‘v)
↔ ((F ‘u) ⊆ (F
‘v) ∧ ¬ (F ‘u) =
(F ‘v))) |
| 14 | 13 | pm3.27bd 263 |
. . . . . . . . . . . . . 14
⊢ ((F
‘u) ⊂ (F ‘v)
→ ¬ (F ‘u) = (F
‘v)) |
| 15 | | cleqcom 1103 |
. . . . . . . . . . . . . . 15
⊢ ((F
‘u) = (F ‘v)
↔ (F ‘v) = (F
‘u)) |
| 16 | 15 | negbii 162 |
. . . . . . . . . . . . . 14
⊢ (¬ (F ‘u) =
(F ‘v) ↔ ¬ (F ‘v) =
(F ‘u)) |
| 17 | 14, 16 | sylib 173 |
. . . . . . . . . . . . 13
⊢ ((F
‘u) ⊂ (F ‘v)
→ ¬ (F ‘v) = (F
‘u)) |
| 18 | 12, 17 | syl6 23 |
. . . . . . . . . . . 12
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → ((v
∈ ω ∧ u ∈ v) → ¬ (F ‘v) =
(F ‘u))) |
| 19 | 18 | exp3a 292 |
. . . . . . . . . . 11
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → (v
∈ ω → (u ∈ v → ¬ (F ‘v) =
(F ‘u)))) |
| 20 | 19 | imp 277 |
. . . . . . . . . 10
⊢ (((¬ x = ∅ ∧ x ⊆ ∪x) ∧ v
∈ ω) → (u ∈ v → ¬ (F ‘v) =
(F ‘u))) |
| 21 | 20 | adantrr 312 |
. . . . . . . . 9
⊢ (((¬ x = ∅ ∧ x ⊆ ∪x) ∧ (v
∈ ω ∧ u ∈ ω))
→ (u ∈ v → ¬ (F ‘v) =
(F ‘u))) |
| 22 | 11, 21 | jaod 329 |
. . . . . . . 8
⊢ (((¬ x = ∅ ∧ x ⊆ ∪x) ∧ (v
∈ ω ∧ u ∈ ω))
→ ((v ∈ u ∨ u ∈
v) → ¬ (F ‘v) =
(F ‘u))) |
| 23 | 22 | con2d 83 |
. . . . . . 7
⊢ (((¬ x = ∅ ∧ x ⊆ ∪x) ∧ (v
∈ ω ∧ u ∈ ω))
→ ((F ‘v) = (F
‘u) → ¬ (v ∈ u ∨
u ∈ v))) |
| 24 | | ordtri3 2234 |
. . . . . . . . 9
⊢ ((Ord v ∧ Ord u)
→ (v = u ↔ ¬ (v ∈ u ∨
u ∈ v))) |
| 25 | | nnord 2381 |
. . . . . . . . 9
⊢ (v
∈ ω → Ord v) |
| 26 | | nnord 2381 |
. . . . . . . . 9
⊢ (u
∈ ω → Ord u) |
| 27 | 24, 25, 26 | syl2an 349 |
. . . . . . . 8
⊢ ((v
∈ ω ∧ u ∈ ω)
→ (v = u ↔ ¬ (v ∈ u ∨
u ∈ v))) |
| 28 | 27 | adantl 305 |
. . . . . . 7
⊢ (((¬ x = ∅ ∧ x ⊆ ∪x) ∧ (v
∈ ω ∧ u ∈ ω))
→ (v = u ↔ ¬ (v ∈ u ∨
u ∈ v))) |
| 29 | 23, 28 | sylibrd 179 |
. . . . . 6
⊢ (((¬ x = ∅ ∧ x ⊆ ∪x) ∧ (v
∈ ω ∧ u ∈ ω))
→ ((F ‘v) = (F
‘u) → v = u)) |
| 30 | 29 | exp 291 |
. . . . 5
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → ((v
∈ ω ∧ u ∈ ω)
→ ((F ‘v) = (F
‘u) → v = u))) |
| 31 | 30 | 19.21aivv 944 |
. . . 4
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → ∀v∀u((v ∈
ω ∧ u ∈ ω) →
((F ‘v) = (F
‘u) → v = u))) |
| 32 | | r2al 1231 |
. . . 4
⊢ (∀v ∈ ω ∀u ∈ ω ((F ‘v) =
(F ‘u) → v =
u) ↔ ∀v∀u((v ∈
ω ∧ u ∈ ω) →
((F ‘v) = (F
‘u) → v = u))) |
| 33 | 31, 32 | sylibr 175 |
. . 3
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → ∀v ∈ ω ∀u ∈ ω ((F ‘v) =
(F ‘u) → v =
u)) |
| 34 | | frfnom 2989 |
. . . . . . 7
⊢ (rec(G, ∅) ↾ ω) Fn ω |
| 35 | | fneq1 2718 |
. . . . . . 7
⊢ (F =
(rec(G, ∅) ↾ ω) →
(F Fn ω ↔ (rec(G, ∅) ↾ ω) Fn ω)) |
| 36 | 34, 35 | mpbiri 169 |
. . . . . 6
⊢ (F =
(rec(G, ∅) ↾ ω) →
F Fn ω) |
| 37 | 2, 36 | ax-mp 6 |
. . . . 5
⊢ F Fn
ω |
| 38 | | fvelrn 2883 |
. . . . . . . 8
⊢ (F Fn
ω → (u ∈ ran F ↔ ∃v ∈ ω (F ‘v) =
u)) |
| 39 | | eleq1 1149 |
. . . . . . . . . . 11
⊢ ((F
‘v) = u → ((F
‘v) ∈ ℘x ↔ u
∈ ℘x)) |
| 40 | | inf3lem.4 |
. . . . . . . . . . . . 13
⊢ B
∈ V |
| 41 | 1, 2, 4, 40 | inf3lemd 3463 |
. . . . . . . . . . . 12
⊢ (v
∈ ω → (F ‘v) ⊆ x) |
| 42 | | fvex 2838 |
. . . . . . . . . . . . 13
⊢ (F
‘v) ∈ V |
| 43 | 42 | elpw 1801 |
. . . . . . . . . . . 12
⊢ ((F
‘v) ∈ ℘x ↔ (F
‘v) ⊆ x) |
| 44 | 41, 43 | sylibr 175 |
. . . . . . . . . . 11
⊢ (v
∈ ω → (F ‘v) ∈ ℘x) |
| 45 | 39, 44 | syl5bi 183 |
. . . . . . . . . 10
⊢ ((F
‘v) = u → (v
∈ ω → u ∈
℘x)) |
| 46 | 45 | com12 13 |
. . . . . . . . 9
⊢ (v
∈ ω → ((F ‘v) = u →
u ∈ ℘x)) |
| 47 | 46 | r19.23aiv 1284 |
. . . . . . . 8
⊢ (∃v ∈ ω (F ‘v) =
u → u ∈ ℘x) |
| 48 | 38, 47 | syl6bi 187 |
. . . . . . 7
⊢ (F Fn
ω → (u ∈ ran F → u
∈ ℘x)) |
| 49 | 48 | ssrdv 1509 |
. . . . . 6
⊢ (F Fn
ω → ran F ⊆
℘x) |
| 50 | 49 | ancli 244 |
. . . . 5
⊢ (F Fn
ω → (F Fn ω ∧ ran
F ⊆ ℘x)) |
| 51 | 37, 50 | ax-mp 6 |
. . . 4
⊢ (F Fn
ω ∧ ran F ⊆
℘x) |
| 52 | | df-f 2434 |
. . . 4
⊢ (F:ω–→℘x ↔ (F Fn
ω ∧ ran F ⊆
℘x)) |
| 53 | 51, 52 | mpbir 165 |
. . 3
⊢ F:ω–→℘x |
| 54 | 33, 53 | jctil 240 |
. 2
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → (F:ω–→℘x ∧ ∀v ∈ ω ∀u ∈ ω ((F ‘v) =
(F ‘u) → v =
u))) |
| 55 | | f1fv 2916 |
. 2
⊢ (F:ω–1-1→℘x
↔ (F:ω–→℘x ∧ ∀v ∈ ω ∀u ∈ ω ((F ‘v) =
(F ‘u) → v =
u))) |
| 56 | 54, 55 | sylibr 175 |
1
⊢ ((¬ x = ∅ ∧ x ⊆ ∪x) → F:ω–1-1→℘x) |