Proof of Theorem mapdom2
| Step | Hyp | Ref
| Expression |
| 1 | | opreq1 3006 |
. . . . . . 7
⊢ (C =
∅ → (C ↑m
A) = (∅ ↑m
A)) |
| 2 | | mapdom1.1 |
. . . . . . . 8
⊢ A
∈ V |
| 3 | 2 | map0b 3267 |
. . . . . . 7
⊢ (¬ A = ∅ → (∅
↑m A) =
∅) |
| 4 | 1, 3 | sylan9eqr 1145 |
. . . . . 6
⊢ ((¬ A = ∅ ∧ C = ∅) → (C ↑m A) = ∅) |
| 5 | | 0dom 3366 |
. . . . . 6
⊢ ∅ ≼ (C ↑m B) |
| 6 | 4, 5 | syl6eqbr 2092 |
. . . . 5
⊢ ((¬ A = ∅ ∧ C = ∅) → (C ↑m A) ≼ (C
↑m B)) |
| 7 | 6 | a1i 7 |
. . . 4
⊢ (A
≼ B → ((¬ A = ∅ ∧ C = ∅) → (C ↑m A) ≼ (C
↑m B))) |
| 8 | | mapdom1.2 |
. . . . . . . 8
⊢ B
∈ V |
| 9 | 8 | domen 3284 |
. . . . . . 7
⊢ (A
≼ B ↔ ∃z(A ≈
z ∧ z ⊆ B)) |
| 10 | | endomtr 3325 |
. . . . . . . . . . 11
⊢ (((C
↑m A) ≈
(C ↑m z) ∧ (C
↑m z) ≼
(C ↑m B)) → (C
↑m A) ≼
(C ↑m B)) |
| 11 | | mapdom1.3 |
. . . . . . . . . . . . 13
⊢ C
∈ V |
| 12 | 11 | enref 3295 |
. . . . . . . . . . . 12
⊢ C
≈ C |
| 13 | | visset 1350 |
. . . . . . . . . . . . 13
⊢ z
∈ V |
| 14 | 11, 11, 2, 13 | mapen 3386 |
. . . . . . . . . . . 12
⊢ ((C
≈ C ∧ A ≈ z)
→ (C ↑m
A) ≈ (C ↑m z)) |
| 15 | 12, 14 | mpan 518 |
. . . . . . . . . . 11
⊢ (A
≈ z → (C ↑m A) ≈ (C
↑m z)) |
| 16 | | oprex 3018 |
. . . . . . . . . . . 12
⊢ (C
↑m z) ∈
V |
| 17 | | ssundif 1764 |
. . . . . . . . . . . . . . . . 17
⊢ (z
⊆ B ↔ (z ∪ (B
∖ z)) = B) |
| 18 | | feq2 2749 |
. . . . . . . . . . . . . . . . 17
⊢ ((z
∪ (B ∖ z)) = B →
((x ∪ ((B ∖ z)
× {w})):(z ∪ (B
∖ z))–→(C ∪ {w})
↔ (x ∪ ((B ∖ z)
× {w})):B–→(C
∪ {w}))) |
| 19 | 17, 18 | sylbi 174 |
. . . . . . . . . . . . . . . 16
⊢ (z
⊆ B → ((x ∪ ((B
∖ z) × {w})):(z ∪
(B ∖ z))–→(C ∪ {w})
↔ (x ∪ ((B ∖ z)
× {w})):B–→(C
∪ {w}))) |
| 20 | | snssi 1851 |
. . . . . . . . . . . . . . . . . 18
⊢ (w
∈ C → {w} ⊆ C) |
| 21 | | ssequn2 1631 |
. . . . . . . . . . . . . . . . . 18
⊢ ({w}
⊆ C ↔ (C ∪ {w}) =
C) |
| 22 | 20, 21 | sylib 173 |
. . . . . . . . . . . . . . . . 17
⊢ (w
∈ C → (C ∪ {w}) =
C) |
| 23 | | feq3 2750 |
. . . . . . . . . . . . . . . . 17
⊢ ((C
∪ {w}) = C → ((x
∪ ((B ∖ z) × {w})):B–→(C
∪ {w}) ↔ (x ∪ ((B
∖ z) × {w})):B–→C)) |
| 24 | 22, 23 | syl 12 |
. . . . . . . . . . . . . . . 16
⊢ (w
∈ C → ((x ∪ ((B
∖ z) × {w})):B–→(C
∪ {w}) ↔ (x ∪ ((B
∖ z) × {w})):B–→C)) |
| 25 | 19, 24 | sylan9bb 418 |
. . . . . . . . . . . . . . 15
⊢ ((z
⊆ B ∧ w ∈ C)
→ ((x ∪ ((B ∖ z)
× {w})):(z ∪ (B
∖ z))–→(C ∪ {w})
↔ (x ∪ ((B ∖ z)
× {w})):B–→C)) |
| 26 | | visset 1350 |
. . . . . . . . . . . . . . . . 17
⊢ w
∈ V |
| 27 | 26 | fconst 2774 |
. . . . . . . . . . . . . . . 16
⊢ ((B
∖ z) × {w}):(B ∖
z)–→{w} |
| 28 | | difdisj 1758 |
. . . . . . . . . . . . . . . . 17
⊢ (z
∩ (B ∖ z)) = ∅ |
| 29 | | fun 2763 |
. . . . . . . . . . . . . . . . 17
⊢ (((x:z–→C
∧ ((B ∖ z) × {w}):(B ∖
z)–→{w}) ∧ (z
∩ (B ∖ z)) = ∅) → (x ∪ ((B
∖ z) × {w})):(z ∪
(B ∖ z))–→(C ∪ {w})) |
| 30 | 28, 29 | mpan2 519 |
. . . . . . . . . . . . . . . 16
⊢ ((x:z–→C
∧ ((B ∖ z) × {w}):(B ∖
z)–→{w}) → (x
∪ ((B ∖ z) × {w})):(z ∪
(B ∖ z))–→(C ∪ {w})) |
| 31 | 27, 30 | mpan2 519 |
. . . . . . . . . . . . . . 15
⊢ (x:z–→C
→ (x ∪ ((B ∖ z)
× {w})):(z ∪ (B
∖ z))–→(C ∪ {w})) |
| 32 | 25, 31 | syl5bi 183 |
. . . . . . . . . . . . . 14
⊢ ((z
⊆ B ∧ w ∈ C)
→ (x:z–→C
→ (x ∪ ((B ∖ z)
× {w})):B–→C)) |
| 33 | 11, 13 | elmap 3265 |
. . . . . . . . . . . . . 14
⊢ (x
∈ (C ↑m
z) ↔ x:z–→C) |
| 34 | 11, 8 | elmap 3265 |
. . . . . . . . . . . . . 14
⊢ ((x
∪ ((B ∖ z) × {w}))
∈ (C ↑m
B) ↔ (x ∪ ((B
∖ z) × {w})):B–→C) |
| 35 | 32, 33, 34 | 3imtr4g 426 |
. . . . . . . . . . . . 13
⊢ ((z
⊆ B ∧ w ∈ C)
→ (x ∈ (C ↑m z) → (x
∪ ((B ∖ z) × {w}))
∈ (C ↑m
B))) |
| 36 | 2, 8, 11 | mapdom2lem 3388 |
. . . . . . . . . . . . . . . . 17
⊢ (x
∈ (C ↑m
z) → (x ∩ ((B
∖ z) × {w})) = ∅) |
| 37 | 2, 8, 11 | mapdom2lem 3388 |
. . . . . . . . . . . . . . . . . 18
⊢ (y
∈ (C ↑m
z) → (y ∩ ((B
∖ z) × {w})) = ∅) |
| 38 | 37 | cleqcomd 1106 |
. . . . . . . . . . . . . . . . 17
⊢ (y
∈ (C ↑m
z) → ∅ = (y ∩ ((B
∖ z) × {w}))) |
| 39 | 36, 38 | sylan9eq 1144 |
. . . . . . . . . . . . . . . 16
⊢ ((x
∈ (C ↑m
z) ∧ y ∈ (C
↑m z)) →
(x ∩ ((B ∖ z)
× {w})) = (y ∩ ((B
∖ z) × {w}))) |
| 40 | 39 | biantrud 545 |
. . . . . . . . . . . . . . 15
⊢ ((x
∈ (C ↑m
z) ∧ y ∈ (C
↑m z)) →
((x ∪ ((B ∖ z)
× {w})) = (y ∪ ((B
∖ z) × {w})) ↔ ((x
∪ ((B ∖ z) × {w}))
= (y ∪ ((B ∖ z)
× {w})) ∧ (x ∩ ((B
∖ z) × {w})) = (y ∩
((B ∖ z) × {w}))))) |
| 41 | | unineq 1680 |
. . . . . . . . . . . . . . 15
⊢ (((x
∪ ((B ∖ z) × {w}))
= (y ∪ ((B ∖ z)
× {w})) ∧ (x ∩ ((B
∖ z) × {w})) = (y ∩
((B ∖ z) × {w}))) ↔ x =
y) |
| 42 | 40, 41 | syl6bb 414 |
. . . . . . . . . . . . . 14
⊢ ((x
∈ (C ↑m
z) ∧ y ∈ (C
↑m z)) →
((x ∪ ((B ∖ z)
× {w})) = (y ∪ ((B
∖ z) × {w})) ↔ x =
y)) |
| 43 | 42 | a1i 7 |
. . . . . . . . . . . . 13
⊢ ((z
⊆ B ∧ w ∈ C)
→ ((x ∈ (C ↑m z) ∧ y
∈ (C ↑m
z)) → ((x ∪ ((B
∖ z) × {w})) = (y ∪
((B ∖ z) × {w}))
↔ x = y))) |
| 44 | 35, 43 | dom2d 3307 |
. . . . . . . . . . . 12
⊢ ((z
⊆ B ∧ w ∈ C)
→ ((C ↑m
z) ∈ V → (C ↑m z) ≼ (C
↑m B))) |
| 45 | 16, 44 | mpi 44 |
. . . . . . . . . . 11
⊢ ((z
⊆ B ∧ w ∈ C)
→ (C ↑m
z) ≼ (C ↑m B)) |
| 46 | 10, 15, 45 | syl2an 349 |
. . . . . . . . . 10
⊢ ((A
≈ z ∧ (z ⊆ B
∧ w ∈ C)) → (C
↑m A) ≼
(C ↑m B)) |
| 47 | 46 | anassrs 338 |
. . . . . . . . 9
⊢ (((A
≈ z ∧ z ⊆ B)
∧ w ∈ C) → (C
↑m A) ≼
(C ↑m B)) |
| 48 | 47 | exp 291 |
. . . . . . . 8
⊢ ((A
≈ z ∧ z ⊆ B)
→ (w ∈ C → (C
↑m A) ≼
(C ↑m B))) |
| 49 | 48 | 19.23aiv 952 |
. . . . . . 7
⊢ (∃z(A ≈
z ∧ z ⊆ B)
→ (w ∈ C → (C
↑m A) ≼
(C ↑m B))) |
| 50 | 9, 49 | sylbi 174 |
. . . . . 6
⊢ (A
≼ B → (w ∈ C
→ (C ↑m
A) ≼ (C ↑m B))) |
| 51 | 50 | 19.23adv 954 |
. . . . 5
⊢ (A
≼ B → (∃w w ∈
C → (C ↑m A) ≼ (C
↑m B))) |
| 52 | | n0 1714 |
. . . . 5
⊢ (¬ C = ∅ ↔ ∃w w ∈
C) |
| 53 | 51, 52 | syl5ib 181 |
. . . 4
⊢ (A
≼ B → (¬ C = ∅ → (C ↑m A) ≼ (C
↑m B))) |
| 54 | 7, 53 | jaod 329 |
. . 3
⊢ (A
≼ B → (((¬ A = ∅ ∧ C = ∅) ∨ ¬ C = ∅) → (C ↑m A) ≼ (C
↑m B))) |
| 55 | 54 | imp 277 |
. 2
⊢ ((A
≼ B ∧ ((¬ A = ∅ ∧ C = ∅) ∨ ¬ C = ∅)) → (C ↑m A) ≼ (C
↑m B)) |
| 56 | | exmid 494 |
. . . 4
⊢ (C =
∅ ∨ ¬ C = ∅) |
| 57 | 56 | biantru 543 |
. . 3
⊢ ((¬ A = ∅ ∨ ¬ C = ∅) ↔ ((¬ A = ∅ ∨ ¬ C = ∅) ∧ (C = ∅ ∨ ¬ C = ∅))) |
| 58 | | ianor 253 |
. . 3
⊢ (¬ (A = ∅ ∧ C = ∅) ↔ (¬ A = ∅ ∨ ¬ C = ∅)) |
| 59 | | ordir 453 |
. . 3
⊢ (((¬ A = ∅ ∧ C = ∅) ∨ ¬ C = ∅) ↔ ((¬ A = ∅ ∨ ¬ C = ∅) ∧ (C = ∅ ∨ ¬ C = ∅))) |
| 60 | 57, 58, 59 | 3bitr4 158 |
. 2
⊢ (¬ (A = ∅ ∧ C = ∅) ↔ ((¬ A = ∅ ∧ C = ∅) ∨ ¬ C = ∅)) |
| 61 | 55, 60 | sylan2b 347 |
1
⊢ ((A
≼ B ∧ ¬ (A = ∅ ∧ C = ∅)) → (C ↑m A) ≼ (C
↑m B)) |