Proof of Theorem kmlem4
| Step | Hyp | Ref
| Expression |
| 1 | | visset 1350 |
. . . . . 6
⊢ w
∈ V |
| 2 | | eleq1 1149 |
. . . . . . . 8
⊢ (v =
w → (v ∈ x
↔ w ∈ x)) |
| 3 | | cleq2 1110 |
. . . . . . . . 9
⊢ (v =
w → (z = v ↔
z = w)) |
| 4 | 3 | negbid 463 |
. . . . . . . 8
⊢ (v =
w → (¬ z = v ↔
¬ z = w)) |
| 5 | 2, 4 | anbi12d 476 |
. . . . . . 7
⊢ (v =
w → ((v ∈ x ∧
¬ z = v) ↔ (w
∈ x ∧ ¬ z = w))) |
| 6 | | eleq2 1150 |
. . . . . . . 8
⊢ (v =
w → (y ∈ v
↔ y ∈ w)) |
| 7 | 6 | negbid 463 |
. . . . . . 7
⊢ (v =
w → (¬ y ∈ v
↔ ¬ y ∈ w)) |
| 8 | 5, 7 | imbi12d 474 |
. . . . . 6
⊢ (v =
w → (((v ∈ x ∧
¬ z = v) → ¬ y ∈ v)
↔ ((w ∈ x ∧ ¬ z
= w) → ¬ y ∈ w))) |
| 9 | 1, 8 | cla4v 1400 |
. . . . 5
⊢ (∀v((v ∈
x ∧ ¬ z = v) →
¬ y ∈ v) → ((w
∈ x ∧ ¬ z = w) →
¬ y ∈ w)) |
| 10 | 9 | com12 13 |
. . . 4
⊢ ((w
∈ x ∧ ¬ z = w) →
(∀v((v ∈ x ∧
¬ z = v) → ¬ y ∈ v)
→ ¬ y ∈ w)) |
| 11 | | eldif 1496 |
. . . . 5
⊢ (y
∈ (z ∖ ∪(x ∖ {z})) ↔ (y
∈ z ∧ ¬ y ∈ ∪(x ∖ {z}))) |
| 12 | | pm3.27 260 |
. . . . . 6
⊢ ((y
∈ z ∧ ¬ y ∈ ∪(x ∖ {z}))
→ ¬ y ∈ ∪(x ∖ {z})) |
| 13 | | eluni 1922 |
. . . . . . . 8
⊢ (y
∈ ∪(x
∖ {z}) ↔ ∃v(y ∈
v ∧ v ∈ (x
∖ {z}))) |
| 14 | 13 | negbii 162 |
. . . . . . 7
⊢ (¬ y ∈ ∪(x ∖ {z})
↔ ¬ ∃v(y ∈ v ∧
v ∈ (x ∖ {z}))) |
| 15 | | alnex 716 |
. . . . . . . 8
⊢ (∀v ¬ (y
∈ v ∧ v ∈ (x
∖ {z})) ↔ ¬ ∃v(y ∈
v ∧ v ∈ (x
∖ {z}))) |
| 16 | | ianor 253 |
. . . . . . . . . 10
⊢ (¬ (y ∈ v ∧
v ∈ (x ∖ {z}))
↔ (¬ y ∈ v ∨ ¬ v
∈ (x ∖ {z}))) |
| 17 | | eldif 1496 |
. . . . . . . . . . . . . . 15
⊢ (v
∈ (x ∖ {z}) ↔ (v
∈ x ∧ ¬ v ∈ {z})) |
| 18 | | elsn 1820 |
. . . . . . . . . . . . . . . . . 18
⊢ (v
∈ {z} ↔ v = z) |
| 19 | | cleqcom 1103 |
. . . . . . . . . . . . . . . . . 18
⊢ (v =
z ↔ z = v) |
| 20 | 18, 19 | bitr 151 |
. . . . . . . . . . . . . . . . 17
⊢ (v
∈ {z} ↔ z = v) |
| 21 | 20 | negbii 162 |
. . . . . . . . . . . . . . . 16
⊢ (¬ v ∈ {z}
↔ ¬ z = v) |
| 22 | 21 | anbi2i 367 |
. . . . . . . . . . . . . . 15
⊢ ((v
∈ x ∧ ¬ v ∈ {z})
↔ (v ∈ x ∧ ¬ z
= v)) |
| 23 | 17, 22 | bitr 151 |
. . . . . . . . . . . . . 14
⊢ (v
∈ (x ∖ {z}) ↔ (v
∈ x ∧ ¬ z = v)) |
| 24 | 23 | negbii 162 |
. . . . . . . . . . . . 13
⊢ (¬ v ∈ (x
∖ {z}) ↔ ¬ (v ∈ x ∧
¬ z = v)) |
| 25 | | iman 205 |
. . . . . . . . . . . . 13
⊢ ((v
∈ x → z = v) ↔
¬ (v ∈ x ∧ ¬ z
= v)) |
| 26 | 24, 25 | bitr4 154 |
. . . . . . . . . . . 12
⊢ (¬ v ∈ (x
∖ {z}) ↔ (v ∈ x
→ z = v)) |
| 27 | 26 | imbi2i 160 |
. . . . . . . . . . 11
⊢ ((y
∈ v → ¬ v ∈ (x
∖ {z})) ↔ (y ∈ v
→ (v ∈ x → z =
v))) |
| 28 | | imor 204 |
. . . . . . . . . . 11
⊢ ((y
∈ v → ¬ v ∈ (x
∖ {z})) ↔ (¬ y ∈ v ∨
¬ v ∈ (x ∖ {z}))) |
| 29 | | pm4.1 143 |
. . . . . . . . . . . . 13
⊢ ((y
∈ v → z = v) ↔
(¬ z = v → ¬ y
∈ v)) |
| 30 | 29 | imbi2i 160 |
. . . . . . . . . . . 12
⊢ ((v
∈ x → (y ∈ v
→ z = v)) ↔ (v
∈ x → (¬ z = v →
¬ y ∈ v))) |
| 31 | | bi2.04 141 |
. . . . . . . . . . . 12
⊢ ((y
∈ v → (v ∈ x
→ z = v)) ↔ (v
∈ x → (y ∈ v
→ z = v))) |
| 32 | | impexp 276 |
. . . . . . . . . . . 12
⊢ (((v
∈ x ∧ ¬ z = v) →
¬ y ∈ v) ↔ (v
∈ x → (¬ z = v →
¬ y ∈ v))) |
| 33 | 30, 31, 32 | 3bitr4 158 |
. . . . . . . . . . 11
⊢ ((y
∈ v → (v ∈ x
→ z = v)) ↔ ((v
∈ x ∧ ¬ z = v) →
¬ y ∈ v)) |
| 34 | 27, 28, 33 | 3bitr3 156 |
. . . . . . . . . 10
⊢ ((¬ y ∈ v ∨
¬ v ∈ (x ∖ {z}))
↔ ((v ∈ x ∧ ¬ z
= v) → ¬ y ∈ v)) |
| 35 | 16, 34 | bitr 151 |
. . . . . . . . 9
⊢ (¬ (y ∈ v ∧
v ∈ (x ∖ {z}))
↔ ((v ∈ x ∧ ¬ z
= v) → ¬ y ∈ v)) |
| 36 | 35 | bial 695 |
. . . . . . . 8
⊢ (∀v ¬ (y
∈ v ∧ v ∈ (x
∖ {z})) ↔ ∀v((v ∈
x ∧ ¬ z = v) →
¬ y ∈ v)) |
| 37 | 15, 36 | bitr3 153 |
. . . . . . 7
⊢ (¬ ∃v(y ∈
v ∧ v ∈ (x
∖ {z})) ↔ ∀v((v ∈
x ∧ ¬ z = v) →
¬ y ∈ v)) |
| 38 | 14, 37 | bitr 151 |
. . . . . 6
⊢ (¬ y ∈ ∪(x ∖ {z})
↔ ∀v((v ∈ x ∧
¬ z = v) → ¬ y ∈ v)) |
| 39 | 12, 38 | sylib 173 |
. . . . 5
⊢ ((y
∈ z ∧ ¬ y ∈ ∪(x ∖ {z}))
→ ∀v((v ∈ x ∧
¬ z = v) → ¬ y ∈ v)) |
| 40 | 11, 39 | sylbi 174 |
. . . 4
⊢ (y
∈ (z ∖ ∪(x ∖ {z})) → ∀v((v ∈
x ∧ ¬ z = v) →
¬ y ∈ v)) |
| 41 | 10, 40 | syl5 22 |
. . 3
⊢ ((w
∈ x ∧ ¬ z = w) →
(y ∈ (z ∖ ∪(x ∖ {z}))
→ ¬ y ∈ w)) |
| 42 | 41 | r19.21aiv 1259 |
. 2
⊢ ((w
∈ x ∧ ¬ z = w) →
∀y ∈ (z ∖ ∪(x ∖ {z}))
¬ y ∈ w) |
| 43 | | disj 1733 |
. 2
⊢ (((z
∖ ∪(x
∖ {z})) ∩ w) = ∅ ↔ ∀y ∈ (z
∖ ∪(x
∖ {z})) ¬ y ∈ w) |
| 44 | 42, 43 | sylibr 175 |
1
⊢ ((w
∈ x ∧ ¬ z = w) →
((z ∖ ∪(x ∖ {z})) ∩ w) =
∅) |