Proof of Theorem aceq5lem4
| Step | Hyp | Ref
| Expression |
| 1 | | aceq5lem.1 |
. . . . 5
⊢ A =
{u∣(¬ u = ∅ ∧ ∃t ∈ h
u = ({t} × t))} |
| 2 | 1 | eleq2i 1153 |
. . . 4
⊢ (z
∈ A ↔ z ∈ {u∣(¬ u
= ∅ ∧ ∃t ∈ h u = ({t} × t))}) |
| 3 | | visset 1350 |
. . . . . 6
⊢ z
∈ V |
| 4 | | cleq1 1107 |
. . . . . . . 8
⊢ (u =
z → (u = ∅ ↔ z = ∅)) |
| 5 | 4 | negbid 463 |
. . . . . . 7
⊢ (u =
z → (¬ u = ∅ ↔ ¬ z = ∅)) |
| 6 | | cleq1 1107 |
. . . . . . . 8
⊢ (u =
z → (u = ({t} ×
t) ↔ z = ({t} ×
t))) |
| 7 | 6 | birexdv 1220 |
. . . . . . 7
⊢ (u =
z → (∃t ∈ h
u = ({t} × t)
↔ ∃t ∈ h z = ({t} × t))) |
| 8 | 5, 7 | anbi12d 476 |
. . . . . 6
⊢ (u =
z → ((¬ u = ∅ ∧ ∃t ∈ h
u = ({t} × t))
↔ (¬ z = ∅ ∧
∃t ∈ h z = ({t} × t)))) |
| 9 | 3, 8 | elab 1415 |
. . . . 5
⊢ (z
∈ {u∣(¬ u = ∅ ∧ ∃t ∈ h
u = ({t} × t))}
↔ (¬ z = ∅ ∧
∃t ∈ h z = ({t} × t))) |
| 10 | 9 | pm3.26bd 259 |
. . . 4
⊢ (z
∈ {u∣(¬ u = ∅ ∧ ∃t ∈ h
u = ({t} × t))}
→ ¬ z = ∅) |
| 11 | 2, 10 | sylbi 174 |
. . 3
⊢ (z
∈ A → ¬ z = ∅) |
| 12 | 11 | rgen 1247 |
. 2
⊢ ∀z ∈ A ¬
z = ∅ |
| 13 | | eleq2 1150 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (z =
({t} × t) → (x
∈ z ↔ x ∈ ({t}
× t))) |
| 14 | | elxp 2442 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (x
∈ ({t} × t) ↔ ∃u∃v(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))) |
| 15 | | excom 728 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (∃u∃v(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))
↔ ∃v∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))) |
| 16 | 14, 15 | bitr 151 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (x
∈ ({t} × t) ↔ ∃v∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))) |
| 17 | 13, 16 | syl6bb 414 |
. . . . . . . . . . . . . . . . . . 19
⊢ (z =
({t} × t) → (x
∈ z ↔ ∃v∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t)))) |
| 18 | | eleq2 1150 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (w =
({g} × g) → (x
∈ w ↔ x ∈ ({g}
× g))) |
| 19 | | elxp 2442 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (x
∈ ({g} × g) ↔ ∃u∃y(x =
〈u, y〉 ∧ (u
∈ {g} ∧ y ∈ g))) |
| 20 | | excom 728 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (∃u∃y(x =
〈u, y〉 ∧ (u
∈ {g} ∧ y ∈ g))
↔ ∃y∃u(x =
〈u, y〉 ∧ (u
∈ {g} ∧ y ∈ g))) |
| 21 | 19, 20 | bitr 151 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (x
∈ ({g} × g) ↔ ∃y∃u(x =
〈u, y〉 ∧ (u
∈ {g} ∧ y ∈ g))) |
| 22 | 18, 21 | syl6bb 414 |
. . . . . . . . . . . . . . . . . . 19
⊢ (w =
({g} × g) → (x
∈ w ↔ ∃y∃u(x =
〈u, y〉 ∧ (u
∈ {g} ∧ y ∈ g)))) |
| 23 | 17, 22 | bi2anan9 478 |
. . . . . . . . . . . . . . . . . 18
⊢ ((z =
({t} × t) ∧ w =
({g} × g)) → ((x
∈ z ∧ x ∈ w)
↔ (∃v∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))
∧ ∃y∃u(x =
〈u, y〉 ∧ (u
∈ {g} ∧ y ∈ g))))) |
| 24 | | eeanv 980 |
. . . . . . . . . . . . . . . . . 18
⊢ (∃v∃y(∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))
∧ ∃u(x = 〈u,
y〉 ∧ (u ∈ {g}
∧ y ∈ g))) ↔ (∃v∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))
∧ ∃y∃u(x =
〈u, y〉 ∧ (u
∈ {g} ∧ y ∈ g)))) |
| 25 | 23, 24 | syl6bbr 416 |
. . . . . . . . . . . . . . . . 17
⊢ ((z =
({t} × t) ∧ w =
({g} × g)) → ((x
∈ z ∧ x ∈ w)
↔ ∃v∃y(∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))
∧ ∃u(x = 〈u,
y〉 ∧ (u ∈ {g}
∧ y ∈ g))))) |
| 26 | | opeq1 1876 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (u =
t → 〈u, v〉 =
〈t, v〉) |
| 27 | 26 | cleq2d 1112 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (u =
t → (x = 〈u,
v〉 ↔ x = 〈t,
v〉)) |
| 28 | 27 | biimpac 326 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ ((x =
〈u, v〉 ∧ u
= t) → x = 〈t,
v〉) |
| 29 | | elsn 1820 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (u
∈ {t} ↔ u = t) |
| 30 | 28, 29 | sylan2b 347 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ ((x =
〈u, v〉 ∧ u
∈ {t}) → x = 〈t,
v〉) |
| 31 | 30 | adantrr 312 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))
→ x = 〈t, v〉) |
| 32 | 31 | 19.23aiv 952 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))
→ x = 〈t, v〉) |
| 33 | | opeq1 1876 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (u =
g → 〈u, y〉 =
〈g, y〉) |
| 34 | 33 | cleq2d 1112 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (u =
g → (x = 〈u,
y〉 ↔ x = 〈g,
y〉)) |
| 35 | 34 | biimpac 326 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ ((x =
〈u, y〉 ∧ u
= g) → x = 〈g,
y〉) |
| 36 | | elsn 1820 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (u
∈ {g} ↔ u = g) |
| 37 | 35, 36 | sylan2b 347 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ ((x =
〈u, y〉 ∧ u
∈ {g}) → x = 〈g,
y〉) |
| 38 | 37 | adantrr 312 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((x =
〈u, y〉 ∧ (u
∈ {g} ∧ y ∈ g))
→ x = 〈g, y〉) |
| 39 | 38 | 19.23aiv 952 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (∃u(x =
〈u, y〉 ∧ (u
∈ {g} ∧ y ∈ g))
→ x = 〈g, y〉) |
| 40 | 32, 39 | anim12i 268 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))
∧ ∃u(x = 〈u,
y〉 ∧ (u ∈ {g}
∧ y ∈ g))) → (x =
〈t, v〉 ∧ x
= 〈g, y〉)) |
| 41 | | cleqtr 1118 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((〈t, v〉 =
x ∧ x = 〈g,
y〉) → 〈t, v〉 =
〈g, y〉) |
| 42 | | cleqcom 1103 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (x =
〈t, v〉 ↔ 〈t, v〉 =
x) |
| 43 | 41, 42 | sylanb 344 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((x =
〈t, v〉 ∧ x
= 〈g, y〉) → 〈t, v〉 =
〈g, y〉) |
| 44 | | visset 1350 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ t
∈ V |
| 45 | | visset 1350 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ v
∈ V |
| 46 | | visset 1350 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ y
∈ V |
| 47 | 44, 45, 46 | opth 1898 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (〈t, v〉 =
〈g, y〉 ↔ (t = g ∧
v = y)) |
| 48 | 47 | pm3.26bd 259 |
. . . . . . . . . . . . . . . . . . 19
⊢ (〈t, v〉 =
〈g, y〉 → t
= g) |
| 49 | 40, 43, 48 | 3syl 21 |
. . . . . . . . . . . . . . . . . 18
⊢ ((∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))
∧ ∃u(x = 〈u,
y〉 ∧ (u ∈ {g}
∧ y ∈ g))) → t =
g) |
| 50 | 49 | 19.23aivv 953 |
. . . . . . . . . . . . . . . . 17
⊢ (∃v∃y(∃u(x =
〈u, v〉 ∧ (u
∈ {t} ∧ v ∈ t))
∧ ∃u(x = 〈u,
y〉 ∧ (u ∈ {g}
∧ y ∈ g))) → t =
g) |
| 51 | 25, 50 | syl6bi 187 |
. . . . . . . . . . . . . . . 16
⊢ ((z =
({t} × t) ∧ w =
({g} × g)) → ((x
∈ z ∧ x ∈ w)
→ t = g)) |
| 52 | | sneq 1816 |
. . . . . . . . . . . . . . . . . 18
⊢ (t =
g → {t} = {g}) |
| 53 | | xpeq1 2440 |
. . . . . . . . . . . . . . . . . 18
⊢ ({t} =
{g} → ({t} × t) =
({g} × t)) |
| 54 | 52, 53 | syl 12 |
. . . . . . . . . . . . . . . . 17
⊢ (t =
g → ({t} × t) =
({g} × t)) |
| 55 | | xpeq2 2441 |
. . . . . . . . . . . . . . . . 17
⊢ (t =
g → ({g} × t) =
({g} × g)) |
| 56 | 54, 55 | eqtrd 1128 |
. . . . . . . . . . . . . . . 16
⊢ (t =
g → ({t} × t) =
({g} × g)) |
| 57 | 51, 56 | syl6 23 |
. . . . . . . . . . . . . . 15
⊢ ((z =
({t} × t) ∧ w =
({g} × g)) → ((x
∈ z ∧ x ∈ w)
→ ({t} × t) = ({g}
× g))) |
| 58 | | cleq12 1113 |
. . . . . . . . . . . . . . 15
⊢ ((z =
({t} × t) ∧ w =
({g} × g)) → (z =
w ↔ ({t} × t) =
({g} × g))) |
| 59 | 57, 58 | sylibrd 179 |
. . . . . . . . . . . . . 14
⊢ ((z =
({t} × t) ∧ w =
({g} × g)) → ((x
∈ z ∧ x ∈ w)
→ z = w)) |
| 60 | 59 | exp 291 |
. . . . . . . . . . . . 13
⊢ (z =
({t} × t) → (w =
({g} × g) → ((x
∈ z ∧ x ∈ w)
→ z = w))) |
| 61 | 60 | a1i 7 |
. . . . . . . . . . . 12
⊢ (t
∈ h → (z = ({t} ×
t) → (w = ({g} ×
g) → ((x ∈ z ∧
x ∈ w) → z =
w)))) |
| 62 | 61 | r19.23aiv 1284 |
. . . . . . . . . . 11
⊢ (∃t ∈ h
z = ({t} × t)
→ (w = ({g} × g)
→ ((x ∈ z ∧ x ∈
w) → z = w))) |
| 63 | 62 | a1d 14 |
. . . . . . . . . 10
⊢ (∃t ∈ h
z = ({t} × t)
→ (g ∈ h → (w =
({g} × g) → ((x
∈ z ∧ x ∈ w)
→ z = w)))) |
| 64 | 63 | r19.23adv 1286 |
. . . . . . . . 9
⊢ (∃t ∈ h
z = ({t} × t)
→ (∃g ∈ h w = ({g} × g)
→ ((x ∈ z ∧ x ∈
w) → z = w))) |
| 65 | 64 | imp 277 |
. . . . . . . 8
⊢ ((∃t ∈ h
z = ({t} × t)
∧ ∃g ∈ h w = ({g} × g))
→ ((x ∈ z ∧ x ∈
w) → z = w)) |
| 66 | 3, 8, 1 | elab2 1419 |
. . . . . . . . 9
⊢ (z
∈ A ↔ (¬ z = ∅ ∧ ∃t ∈ h
z = ({t} × t))) |
| 67 | 66 | pm3.27bd 263 |
. . . . . . . 8
⊢ (z
∈ A → ∃t ∈ h
z = ({t} × t)) |
| 68 | | visset 1350 |
. . . . . . . . . . 11
⊢ w
∈ V |
| 69 | | cleq1 1107 |
. . . . . . . . . . . . 13
⊢ (u =
w → (u = ∅ ↔ w = ∅)) |
| 70 | 69 | negbid 463 |
. . . . . . . . . . . 12
⊢ (u =
w → (¬ u = ∅ ↔ ¬ w = ∅)) |
| 71 | | cleq1 1107 |
. . . . . . . . . . . . 13
⊢ (u =
w → (u = ({t} ×
t) ↔ w = ({t} ×
t))) |
| 72 | 71 | birexdv 1220 |
. . . . . . . . . . . 12
⊢ (u =
w → (∃t ∈ h
u = ({t} × t)
↔ ∃t ∈ h w = ({t} × t))) |
| 73 | 70, 72 | anbi12d 476 |
. . . . . . . . . . 11
⊢ (u =
w → ((¬ u = ∅ ∧ ∃t ∈ h
u = ({t} × t))
↔ (¬ w = ∅ ∧
∃t ∈ h w = ({t} × t)))) |
| 74 | 68, 73, 1 | elab2 1419 |
. . . . . . . . . 10
⊢ (w
∈ A ↔ (¬ w = ∅ ∧ ∃t ∈ h
w = ({t} × t))) |
| 75 | 74 | pm3.27bd 263 |
. . . . . . . . 9
⊢ (w
∈ A → ∃t ∈ h
w = ({t} × t)) |
| 76 | 56 | cleq2d 1112 |
. . . . . . . . . 10
⊢ (t =
g → (w = ({t} ×
t) ↔ w = ({g} ×
g))) |
| 77 | 76 | cbvrexv 1334 |
. . . . . . . . 9
⊢ (∃t ∈ h
w = ({t} × t)
↔ ∃g ∈ h w = ({g} × g)) |
| 78 | 75, 77 | sylib 173 |
. . . . . . . 8
⊢ (w
∈ A → ∃g ∈ h
w = ({g} × g)) |
| 79 | 65, 67, 78 | syl2an 349 |
. . . . . . 7
⊢ ((z
∈ A ∧ w ∈ A)
→ ((x ∈ z ∧ x ∈
w) → z = w)) |
| 80 | | df-an 198 |
. . . . . . 7
⊢ ((x
∈ z ∧ x ∈ w)
↔ ¬ (x ∈ z → ¬ x
∈ w)) |
| 81 | 79, 80 | syl5ibr 182 |
. . . . . 6
⊢ ((z
∈ A ∧ w ∈ A)
→ (¬ (x ∈ z → ¬ x
∈ w) → z = w)) |
| 82 | 81 | con1d 85 |
. . . . 5
⊢ ((z
∈ A ∧ w ∈ A)
→ (¬ z = w → (x
∈ z → ¬ x ∈ w))) |
| 83 | 82 | 19.21adv 945 |
. . . 4
⊢ ((z
∈ A ∧ w ∈ A)
→ (¬ z = w → ∀x(x ∈
z → ¬ x ∈ w))) |
| 84 | | disj1 1734 |
. . . 4
⊢ ((z
∩ w) = ∅ ↔ ∀x(x ∈
z → ¬ x ∈ w)) |
| 85 | 83, 84 | syl6ibr 186 |
. . 3
⊢ ((z
∈ A ∧ w ∈ A)
→ (¬ z = w → (z
∩ w) = ∅)) |
| 86 | 85 | rgen2 1248 |
. 2
⊢ ∀z ∈ A
∀w ∈ A (¬ z =
w → (z ∩ w) =
∅) |
| 87 | | aceq5lem.3 |
. . 3
⊢ (φ
↔ ∀x((∀z ∈ x ¬
z = ∅ ∧ ∀z ∈ x
∀w ∈ x (¬ z =
w → (z ∩ w) =
∅)) → ∃y∀z ∈ x
∃!v v ∈ (z
∩ y))) |
| 88 | | visset 1350 |
. . . . . . 7
⊢ h
∈ V |
| 89 | 88 | abrexex 2912 |
. . . . . 6
⊢ {u∣∃t
∈ h u = ({t} ×
t)} ∈ V |
| 90 | | pm3.27 260 |
. . . . . . 7
⊢ ((¬ u = ∅ ∧ ∃t ∈ h
u = ({t} × t))
→ ∃t ∈ h u = ({t} × t)) |
| 91 | 90 | ss2abi 1552 |
. . . . . 6
⊢ {u∣(¬ u
= ∅ ∧ ∃t ∈ h u = ({t} × t))}
⊆ {u∣∃t ∈ h
u = ({t} × t)} |
| 92 | 89, 91 | ssexi 1701 |
. . . . 5
⊢ {u∣(¬ u
= ∅ ∧ ∃t ∈ h u = ({t} × t))}
∈ V |
| 93 | 1, 92 | eqeltr 1159 |
. . . 4
⊢ A
∈ V |
| 94 | | raleq 1324 |
. . . . . 6
⊢ (x =
A → (∀z ∈ x ¬
z = ∅ ↔ ∀z ∈ A ¬
z = ∅)) |
| 95 | | raleq 1324 |
. . . . . . 7
⊢ (x =
A → (∀w ∈ x
(¬ z = w → (z
∩ w) = ∅) ↔ ∀w ∈ A
(¬ z = w → (z
∩ w) = ∅))) |
| 96 | 95 | raleqd 1327 |
. . . . . 6
⊢ (x =
A → (∀z ∈ x
∀w ∈ x (¬ z =
w → (z ∩ w) =
∅) ↔ ∀z ∈ A ∀w
∈ A (¬ z = w →
(z ∩ w) = ∅))) |
| 97 | 94, 96 | anbi12d 476 |
. . . . 5
⊢ (x =
A → ((∀z ∈ x ¬
z = ∅ ∧ ∀z ∈ x
∀w ∈ x (¬ z =
w → (z ∩ w) =
∅)) ↔ (∀z ∈ A ¬ z =
∅ ∧ ∀z ∈ A ∀w
∈ A (¬ z = w →
(z ∩ w) = ∅)))) |
| 98 | | raleq 1324 |
. . . . . 6
⊢ (x =
A → (∀z ∈ x
∃!v v ∈ (z
∩ y) ↔ ∀z ∈ A
∃!v v ∈ (z
∩ y))) |
| 99 | 98 | biexdv 936 |
. . . . 5
⊢ (x =
A → (∃y∀z
∈ x ∃!v v ∈
(z ∩ y) ↔ ∃y∀z
∈ A ∃!v v ∈
(z ∩ y))) |
| 100 | 97, 99 | imbi12d 474 |
. . . 4
⊢ (x =
A → (((∀z ∈ x ¬
z = ∅ ∧ ∀z ∈ x
∀w ∈ x (¬ z =
w → (z ∩ w) =
∅)) → ∃y∀z ∈ x
∃!v v ∈ (z
∩ y)) ↔ ((∀z ∈ A ¬
z = ∅ ∧ ∀z ∈ A
∀w ∈ A (¬ z =
w → (z ∩ w) =
∅)) → ∃y∀z ∈ A
∃!v v ∈ (z
∩ y)))) |
| 101 | 93, 100 | cla4v 1400 |
. . 3
⊢ (∀x((∀z
∈ x ¬ z = ∅ ∧ ∀z ∈ x
∀w ∈ x (¬ z =
w → (z ∩ w) =
∅)) → ∃y∀z ∈ x
∃!v v ∈ (z
∩ y)) → ((∀z ∈ A ¬
z = ∅ ∧ ∀z ∈ A
∀w ∈ A (¬ z =
w → (z ∩ w) =
∅)) → ∃y∀z ∈ A
∃!v v ∈ (z
∩ y))) |
| 102 | 87, 101 | sylbi 174 |
. 2
⊢ (φ
→ ((∀z ∈ A ¬ z =
∅ ∧ ∀z ∈ A ∀w
∈ A (¬ z = w →
(z ∩ w) = ∅)) → ∃y∀z
∈ A ∃!v v ∈
(z ∩ y))) |
| 103 | 12, 86, 102 | mp2ani 523 |
1
⊢ (φ
→ ∃y∀z ∈ A
∃!v v ∈ (z
∩ y)) |