Step | Hyp | Ref
| Expression |
1 | | simp1 1134 |
. . 3
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → 𝑀 ∈ (measures‘𝑆)) |
2 | | simp3l 1199 |
. . . . . 6
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → 𝐴 ≼ ω) |
3 | | measvunilem.1 |
. . . . . . 7
⊢
Ⅎ𝑥𝐴 |
4 | 3 | abrexctf 30955 |
. . . . . 6
⊢ (𝐴 ≼ ω → {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ≼ ω) |
5 | 2, 4 | syl 17 |
. . . . 5
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ≼ ω) |
6 | | ctex 8708 |
. . . . 5
⊢ ({𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ≼ ω → {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ∈ V) |
7 | 5, 6 | syl 17 |
. . . 4
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ∈ V) |
8 | | simp2 1135 |
. . . . 5
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅})) |
9 | | eldifi 4057 |
. . . . . . 7
⊢ (𝐵 ∈ (𝑆 ∖ {∅}) → 𝐵 ∈ 𝑆) |
10 | 9 | ralimi 3086 |
. . . . . 6
⊢
(∀𝑥 ∈
𝐴 𝐵 ∈ (𝑆 ∖ {∅}) → ∀𝑥 ∈ 𝐴 𝐵 ∈ 𝑆) |
11 | | nfcv 2906 |
. . . . . . 7
⊢
Ⅎ𝑥𝑆 |
12 | 11 | abrexss 30758 |
. . . . . 6
⊢
(∀𝑥 ∈
𝐴 𝐵 ∈ 𝑆 → {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ⊆ 𝑆) |
13 | 10, 12 | syl 17 |
. . . . 5
⊢
(∀𝑥 ∈
𝐴 𝐵 ∈ (𝑆 ∖ {∅}) → {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ⊆ 𝑆) |
14 | 8, 13 | syl 17 |
. . . 4
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ⊆ 𝑆) |
15 | | elpwg 4533 |
. . . . 5
⊢ ({𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ∈ V → ({𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ∈ 𝒫 𝑆 ↔ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ⊆ 𝑆)) |
16 | 15 | biimpar 477 |
. . . 4
⊢ (({𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ∈ V ∧ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ⊆ 𝑆) → {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ∈ 𝒫 𝑆) |
17 | 7, 14, 16 | syl2anc 583 |
. . 3
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ∈ 𝒫 𝑆) |
18 | | simp3r 1200 |
. . . 4
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → Disj 𝑥 ∈ 𝐴 𝐵) |
19 | 3 | disjabrexf 30823 |
. . . 4
⊢
(Disj 𝑥
∈ 𝐴 𝐵 → Disj 𝑧 ∈ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵}𝑧) |
20 | 18, 19 | syl 17 |
. . 3
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → Disj 𝑧 ∈ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵}𝑧) |
21 | | measvun 32077 |
. . 3
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ∈ 𝒫 𝑆 ∧ ({𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} ≼ ω ∧ Disj 𝑧 ∈ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵}𝑧)) → (𝑀‘∪ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵}) = Σ*𝑧 ∈ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} (𝑀‘𝑧)) |
22 | 1, 17, 5, 20, 21 | syl112anc 1372 |
. 2
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → (𝑀‘∪ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵}) = Σ*𝑧 ∈ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} (𝑀‘𝑧)) |
23 | | dfiun2g 4957 |
. . . 4
⊢
(∀𝑥 ∈
𝐴 𝐵 ∈ (𝑆 ∖ {∅}) → ∪ 𝑥 ∈ 𝐴 𝐵 = ∪ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵}) |
24 | 23 | fveq2d 6760 |
. . 3
⊢
(∀𝑥 ∈
𝐴 𝐵 ∈ (𝑆 ∖ {∅}) → (𝑀‘∪ 𝑥 ∈ 𝐴 𝐵) = (𝑀‘∪ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵})) |
25 | 8, 24 | syl 17 |
. 2
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → (𝑀‘∪
𝑥 ∈ 𝐴 𝐵) = (𝑀‘∪ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵})) |
26 | | nfcv 2906 |
. . 3
⊢
Ⅎ𝑥(𝑀‘𝑧) |
27 | | nfv 1918 |
. . . 4
⊢
Ⅎ𝑥 𝑀 ∈ (measures‘𝑆) |
28 | | nfra1 3142 |
. . . 4
⊢
Ⅎ𝑥∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) |
29 | | nfcv 2906 |
. . . . . 6
⊢
Ⅎ𝑥
≼ |
30 | | nfcv 2906 |
. . . . . 6
⊢
Ⅎ𝑥ω |
31 | 3, 29, 30 | nfbr 5117 |
. . . . 5
⊢
Ⅎ𝑥 𝐴 ≼
ω |
32 | | nfdisj1 5049 |
. . . . 5
⊢
Ⅎ𝑥Disj
𝑥 ∈ 𝐴 𝐵 |
33 | 31, 32 | nfan 1903 |
. . . 4
⊢
Ⅎ𝑥(𝐴 ≼ ω ∧
Disj 𝑥 ∈ 𝐴 𝐵) |
34 | 27, 28, 33 | nf3an 1905 |
. . 3
⊢
Ⅎ𝑥(𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) |
35 | | fveq2 6756 |
. . 3
⊢ (𝑧 = 𝐵 → (𝑀‘𝑧) = (𝑀‘𝐵)) |
36 | | ctex 8708 |
. . . 4
⊢ (𝐴 ≼ ω → 𝐴 ∈ V) |
37 | 2, 36 | syl 17 |
. . 3
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → 𝐴 ∈ V) |
38 | 8 | r19.21bi 3132 |
. . . 4
⊢ (((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ (𝑆 ∖ {∅})) |
39 | 34, 3, 38, 18 | disjdsct 30937 |
. . 3
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → Fun ◡(𝑥 ∈ 𝐴 ↦ 𝐵)) |
40 | | simpl1 1189 |
. . . 4
⊢ (((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) ∧ 𝑥 ∈ 𝐴) → 𝑀 ∈ (measures‘𝑆)) |
41 | | measvxrge0 32073 |
. . . . 5
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ 𝐵 ∈ 𝑆) → (𝑀‘𝐵) ∈ (0[,]+∞)) |
42 | 9, 41 | sylan2 592 |
. . . 4
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ 𝐵 ∈ (𝑆 ∖ {∅})) → (𝑀‘𝐵) ∈ (0[,]+∞)) |
43 | 40, 38, 42 | syl2anc 583 |
. . 3
⊢ (((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) ∧ 𝑥 ∈ 𝐴) → (𝑀‘𝐵) ∈ (0[,]+∞)) |
44 | 26, 34, 3, 35, 37, 39, 43, 38 | esumc 31919 |
. 2
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → Σ*𝑥 ∈ 𝐴(𝑀‘𝐵) = Σ*𝑧 ∈ {𝑦 ∣ ∃𝑥 ∈ 𝐴 𝑦 = 𝐵} (𝑀‘𝑧)) |
45 | 22, 25, 44 | 3eqtr4d 2788 |
1
⊢ ((𝑀 ∈ (measures‘𝑆) ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ (𝑆 ∖ {∅}) ∧ (𝐴 ≼ ω ∧ Disj 𝑥 ∈ 𝐴 𝐵)) → (𝑀‘∪
𝑥 ∈ 𝐴 𝐵) = Σ*𝑥 ∈ 𝐴(𝑀‘𝐵)) |