Proof of Theorem isipodrs
Step | Hyp | Ref
| Expression |
1 | | eqid 2738 |
. . . . 5
⊢
(Base‘(toInc‘𝐴)) = (Base‘(toInc‘𝐴)) |
2 | 1 | drsbn0 17937 |
. . . 4
⊢
((toInc‘𝐴)
∈ Dirset → (Base‘(toInc‘𝐴)) ≠ ∅) |
3 | 2 | neneqd 2947 |
. . 3
⊢
((toInc‘𝐴)
∈ Dirset → ¬ (Base‘(toInc‘𝐴)) = ∅) |
4 | | fvprc 6748 |
. . . . 5
⊢ (¬
𝐴 ∈ V →
(toInc‘𝐴) =
∅) |
5 | 4 | fveq2d 6760 |
. . . 4
⊢ (¬
𝐴 ∈ V →
(Base‘(toInc‘𝐴)) = (Base‘∅)) |
6 | | base0 16845 |
. . . 4
⊢ ∅ =
(Base‘∅) |
7 | 5, 6 | eqtr4di 2797 |
. . 3
⊢ (¬
𝐴 ∈ V →
(Base‘(toInc‘𝐴)) = ∅) |
8 | 3, 7 | nsyl2 141 |
. 2
⊢
((toInc‘𝐴)
∈ Dirset → 𝐴
∈ V) |
9 | | simp1 1134 |
. 2
⊢ ((𝐴 ∈ V ∧ 𝐴 ≠ ∅ ∧
∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧) → 𝐴 ∈ V) |
10 | | eqid 2738 |
. . . 4
⊢
(le‘(toInc‘𝐴)) = (le‘(toInc‘𝐴)) |
11 | 1, 10 | isdrs 17934 |
. . 3
⊢
((toInc‘𝐴)
∈ Dirset ↔ ((toInc‘𝐴) ∈ Proset ∧
(Base‘(toInc‘𝐴)) ≠ ∅ ∧ ∀𝑥 ∈
(Base‘(toInc‘𝐴))∀𝑦 ∈ (Base‘(toInc‘𝐴))∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧))) |
12 | | eqid 2738 |
. . . . . . . 8
⊢
(toInc‘𝐴) =
(toInc‘𝐴) |
13 | 12 | ipopos 18169 |
. . . . . . 7
⊢
(toInc‘𝐴)
∈ Poset |
14 | | posprs 17949 |
. . . . . . 7
⊢
((toInc‘𝐴)
∈ Poset → (toInc‘𝐴) ∈ Proset ) |
15 | 13, 14 | mp1i 13 |
. . . . . 6
⊢ (𝐴 ∈ V →
(toInc‘𝐴) ∈
Proset ) |
16 | | id 22 |
. . . . . 6
⊢ (𝐴 ∈ V → 𝐴 ∈ V) |
17 | 15, 16 | 2thd 264 |
. . . . 5
⊢ (𝐴 ∈ V →
((toInc‘𝐴) ∈
Proset ↔ 𝐴 ∈
V)) |
18 | 12 | ipobas 18164 |
. . . . . . 7
⊢ (𝐴 ∈ V → 𝐴 =
(Base‘(toInc‘𝐴))) |
19 | | neeq1 3005 |
. . . . . . . 8
⊢ (𝐴 =
(Base‘(toInc‘𝐴)) → (𝐴 ≠ ∅ ↔
(Base‘(toInc‘𝐴)) ≠ ∅)) |
20 | | rexeq 3334 |
. . . . . . . . . 10
⊢ (𝐴 =
(Base‘(toInc‘𝐴)) → (∃𝑧 ∈ 𝐴 (𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧) ↔ ∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧))) |
21 | 20 | raleqbi1dv 3331 |
. . . . . . . . 9
⊢ (𝐴 =
(Base‘(toInc‘𝐴)) → (∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧) ↔ ∀𝑦 ∈ (Base‘(toInc‘𝐴))∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧))) |
22 | 21 | raleqbi1dv 3331 |
. . . . . . . 8
⊢ (𝐴 =
(Base‘(toInc‘𝐴)) → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧) ↔ ∀𝑥 ∈ (Base‘(toInc‘𝐴))∀𝑦 ∈ (Base‘(toInc‘𝐴))∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧))) |
23 | 19, 22 | anbi12d 630 |
. . . . . . 7
⊢ (𝐴 =
(Base‘(toInc‘𝐴)) → ((𝐴 ≠ ∅ ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧)) ↔ ((Base‘(toInc‘𝐴)) ≠ ∅ ∧
∀𝑥 ∈
(Base‘(toInc‘𝐴))∀𝑦 ∈ (Base‘(toInc‘𝐴))∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧)))) |
24 | 18, 23 | syl 17 |
. . . . . 6
⊢ (𝐴 ∈ V → ((𝐴 ≠ ∅ ∧
∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧)) ↔ ((Base‘(toInc‘𝐴)) ≠ ∅ ∧
∀𝑥 ∈
(Base‘(toInc‘𝐴))∀𝑦 ∈ (Base‘(toInc‘𝐴))∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧)))) |
25 | | simpll 763 |
. . . . . . . . . . . 12
⊢ (((𝐴 ∈ V ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) ∧ 𝑧 ∈ 𝐴) → 𝐴 ∈ V) |
26 | | simplrl 773 |
. . . . . . . . . . . 12
⊢ (((𝐴 ∈ V ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) ∧ 𝑧 ∈ 𝐴) → 𝑥 ∈ 𝐴) |
27 | | simpr 484 |
. . . . . . . . . . . 12
⊢ (((𝐴 ∈ V ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) ∧ 𝑧 ∈ 𝐴) → 𝑧 ∈ 𝐴) |
28 | 12, 10 | ipole 18167 |
. . . . . . . . . . . 12
⊢ ((𝐴 ∈ V ∧ 𝑥 ∈ 𝐴 ∧ 𝑧 ∈ 𝐴) → (𝑥(le‘(toInc‘𝐴))𝑧 ↔ 𝑥 ⊆ 𝑧)) |
29 | 25, 26, 27, 28 | syl3anc 1369 |
. . . . . . . . . . 11
⊢ (((𝐴 ∈ V ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) ∧ 𝑧 ∈ 𝐴) → (𝑥(le‘(toInc‘𝐴))𝑧 ↔ 𝑥 ⊆ 𝑧)) |
30 | | simplrr 774 |
. . . . . . . . . . . 12
⊢ (((𝐴 ∈ V ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) ∧ 𝑧 ∈ 𝐴) → 𝑦 ∈ 𝐴) |
31 | 12, 10 | ipole 18167 |
. . . . . . . . . . . 12
⊢ ((𝐴 ∈ V ∧ 𝑦 ∈ 𝐴 ∧ 𝑧 ∈ 𝐴) → (𝑦(le‘(toInc‘𝐴))𝑧 ↔ 𝑦 ⊆ 𝑧)) |
32 | 25, 30, 27, 31 | syl3anc 1369 |
. . . . . . . . . . 11
⊢ (((𝐴 ∈ V ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) ∧ 𝑧 ∈ 𝐴) → (𝑦(le‘(toInc‘𝐴))𝑧 ↔ 𝑦 ⊆ 𝑧)) |
33 | 29, 32 | anbi12d 630 |
. . . . . . . . . 10
⊢ (((𝐴 ∈ V ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) ∧ 𝑧 ∈ 𝐴) → ((𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧) ↔ (𝑥 ⊆ 𝑧 ∧ 𝑦 ⊆ 𝑧))) |
34 | | unss 4114 |
. . . . . . . . . 10
⊢ ((𝑥 ⊆ 𝑧 ∧ 𝑦 ⊆ 𝑧) ↔ (𝑥 ∪ 𝑦) ⊆ 𝑧) |
35 | 33, 34 | bitrdi 286 |
. . . . . . . . 9
⊢ (((𝐴 ∈ V ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) ∧ 𝑧 ∈ 𝐴) → ((𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧) ↔ (𝑥 ∪ 𝑦) ⊆ 𝑧)) |
36 | 35 | rexbidva 3224 |
. . . . . . . 8
⊢ ((𝐴 ∈ V ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → (∃𝑧 ∈ 𝐴 (𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧) ↔ ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧)) |
37 | 36 | 2ralbidva 3121 |
. . . . . . 7
⊢ (𝐴 ∈ V → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧) ↔ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧)) |
38 | 37 | anbi2d 628 |
. . . . . 6
⊢ (𝐴 ∈ V → ((𝐴 ≠ ∅ ∧
∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧)) ↔ (𝐴 ≠ ∅ ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧))) |
39 | 24, 38 | bitr3d 280 |
. . . . 5
⊢ (𝐴 ∈ V →
(((Base‘(toInc‘𝐴)) ≠ ∅ ∧ ∀𝑥 ∈
(Base‘(toInc‘𝐴))∀𝑦 ∈ (Base‘(toInc‘𝐴))∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧)) ↔ (𝐴 ≠ ∅ ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧))) |
40 | 17, 39 | anbi12d 630 |
. . . 4
⊢ (𝐴 ∈ V →
(((toInc‘𝐴) ∈
Proset ∧ ((Base‘(toInc‘𝐴)) ≠ ∅ ∧ ∀𝑥 ∈
(Base‘(toInc‘𝐴))∀𝑦 ∈ (Base‘(toInc‘𝐴))∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧))) ↔ (𝐴 ∈ V ∧ (𝐴 ≠ ∅ ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧)))) |
41 | | 3anass 1093 |
. . . 4
⊢
(((toInc‘𝐴)
∈ Proset ∧ (Base‘(toInc‘𝐴)) ≠ ∅ ∧ ∀𝑥 ∈
(Base‘(toInc‘𝐴))∀𝑦 ∈ (Base‘(toInc‘𝐴))∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧)) ↔ ((toInc‘𝐴) ∈ Proset ∧
((Base‘(toInc‘𝐴)) ≠ ∅ ∧ ∀𝑥 ∈
(Base‘(toInc‘𝐴))∀𝑦 ∈ (Base‘(toInc‘𝐴))∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧)))) |
42 | | 3anass 1093 |
. . . 4
⊢ ((𝐴 ∈ V ∧ 𝐴 ≠ ∅ ∧
∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧) ↔ (𝐴 ∈ V ∧ (𝐴 ≠ ∅ ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧))) |
43 | 40, 41, 42 | 3bitr4g 313 |
. . 3
⊢ (𝐴 ∈ V →
(((toInc‘𝐴) ∈
Proset ∧ (Base‘(toInc‘𝐴)) ≠ ∅ ∧ ∀𝑥 ∈
(Base‘(toInc‘𝐴))∀𝑦 ∈ (Base‘(toInc‘𝐴))∃𝑧 ∈ (Base‘(toInc‘𝐴))(𝑥(le‘(toInc‘𝐴))𝑧 ∧ 𝑦(le‘(toInc‘𝐴))𝑧)) ↔ (𝐴 ∈ V ∧ 𝐴 ≠ ∅ ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧))) |
44 | 11, 43 | syl5bb 282 |
. 2
⊢ (𝐴 ∈ V →
((toInc‘𝐴) ∈
Dirset ↔ (𝐴 ∈ V
∧ 𝐴 ≠ ∅ ∧
∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧))) |
45 | 8, 9, 44 | pm5.21nii 379 |
1
⊢
((toInc‘𝐴)
∈ Dirset ↔ (𝐴
∈ V ∧ 𝐴 ≠
∅ ∧ ∀𝑥
∈ 𝐴 ∀𝑦 ∈ 𝐴 ∃𝑧 ∈ 𝐴 (𝑥 ∪ 𝑦) ⊆ 𝑧)) |